When using the JBossWS 3.2.2-SNAPSHOT, the ClassCastException is fixed, but then has this problem:

10:35:09,611 INFO [STDOUT] [Quickstart_webservice_bpel] Message before invoking 'ABI_OrderManager' endpoint:
10:35:09,612 INFO [STDOUT] [<env:Envelope xmlns:env='http://schemas.xmlsoap.org/soap/envelope/'><env:Header></env:Header><env:Body><customerOrder xmlns='http://org.jboss.esb/quickstarts/bpel/ABI_OrderManager'><ns:header xmlns:ns='http://org.jboss.esb/quickstarts/bpel/ABI_OrderManager'><ns1:billTerms xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'/><ns1:billTo xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'><ns1:address><ns1:city xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>Shelton</ns1:city><ns1:state xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>CT</ns1:state><ns1:street1 xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>160 Active Lane</ns1:street1><ns1:street2 xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'/><ns1:zip xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>06484</ns1:zip></ns1:address><ns1:company>Active Steel</ns1:company><ns1:contact><ns1:email xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>bob@activeSteel.com</ns1:email><ns1:fax xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>(203) 555-1235</ns1:fax><ns1:name xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>Bob Active</ns1:name><ns1:phone xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>(203) 555-1234</ns1:phone></ns1:contact></ns1:billTo><ns1:customerNumber xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>123456</ns1:customerNumber><ns1:orderDate xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>2006-05-01T00:00:00.000Z </ns1:orderDate><ns1:orderTotal xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>88500.00</ns1:orderTotal><ns1:poNumber xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>PO000123</ns1:poNumber><ns1:shipTerms xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'/><ns1:shipTo xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'><ns1:address><ns1:city xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>Shelton</ns1:city><ns1:state xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>CT</ns1:state><ns1:street1 xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>160 Active Lane</ns1:street1><ns1:street2 xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'/><ns1:zip xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>06484</ns1:zip></ns1:address><ns1:company>Active Steel</ns1:company><ns1:contact><ns1:email xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>bob@activeSteel.com</ns1:email><ns1:fax xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>(203) 555-1235</ns1:fax><ns1:name xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>Bob Active</ns1:name><ns1:phone xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>(203) 555-1234</ns1:phone></ns1:contact></ns1:shipTo></ns:header><ns:items xmlns:ns='http://org.jboss.esb/quickstarts/bpel/ABI_OrderManager'><ns1:description xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>Flat 16 feet 100 count</ns1:description><ns1:extensionAmount xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>24500.00</ns1:extensionAmount><ns1:partNumber xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>FLT16100</ns1:partNumber><ns1:price xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>490.00</ns1:price><ns1:quantity xmlns:ns1='http://www.jboss.org/samples/bpel/CustomerOrder.xsd'>50</ns1:quantity></ns:items></customerOrder></env:Body></env:Envelope>].
10:35:09,719 ERROR [SOAPMessageUnMarshallerHTTP] Cannot unmarshall SOAPMessage
javax.xml.soap.SOAPException: Unsupported content type: text/plain
at org.jboss.ws.core.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:274)
at org.jboss.ws.core.soap.SOAPMessageUnMarshallerHTTP.read(SOAPMessageUnMarshallerHTTP.java:83)
at org.jboss.ws.core.client.transport.NettyClient.invokeInternal(NettyClient.java:193)
at org.jboss.ws.core.client.transport.NettyClient.invoke(NettyClient.java:121)
at org.jboss.ws.core.client.HTTPRemotingConnection.invoke(HTTPRemotingConnection.java:150)
at org.jboss.ws.core.client.SOAPProtocolConnectionHTTP.invoke(SOAPProtocolConnectionHTTP.java:69)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternalSOAP(DispatchImpl.java:247)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternal(DispatchImpl.java:170)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invoke(DispatchImpl.java:133)
at org.jboss.soa.bpel.runtime.ws.WebServiceClient$1$1.call(WebServiceClient.java:138)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
10:35:09,720 ERROR [DispatchImpl] Cannot dispatch message
java.io.IOException: javax.xml.soap.SOAPException: Unsupported content type: text/plain
at org.jboss.ws.core.soap.SOAPMessageUnMarshallerHTTP.read(SOAPMessageUnMarshallerHTTP.java:91)
at org.jboss.ws.core.client.transport.NettyClient.invokeInternal(NettyClient.java:193)
at org.jboss.ws.core.client.transport.NettyClient.invoke(NettyClient.java:121)
at org.jboss.ws.core.client.HTTPRemotingConnection.invoke(HTTPRemotingConnection.java:150)
at org.jboss.ws.core.client.SOAPProtocolConnectionHTTP.invoke(SOAPProtocolConnectionHTTP.java:69)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternalSOAP(DispatchImpl.java:247)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternal(DispatchImpl.java:170)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invoke(DispatchImpl.java:133)
at org.jboss.soa.bpel.runtime.ws.WebServiceClient$1$1.call(WebServiceClient.java:138)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: javax.xml.soap.SOAPException: Unsupported content type: text/plain
at org.jboss.ws.core.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:274)
at org.jboss.ws.core.soap.SOAPMessageUnMarshallerHTTP.read(SOAPMessageUnMarshallerHTTP.java:83)
... 13 more
10:35:09,720 ERROR [WebServiceClient] WS invocation failed
javax.xml.ws.WebServiceException: Cannot dispatch message
at org.jboss.ws.core.jaxws.client.DispatchImpl.handleInvokeException(DispatchImpl.java:379)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invoke(DispatchImpl.java:137)
at org.jboss.soa.bpel.runtime.ws.WebServiceClient$1$1.call(WebServiceClient.java:138)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.IOException: javax.xml.soap.SOAPException: Unsupported content type: text/plain
at org.jboss.ws.core.soap.SOAPMessageUnMarshallerHTTP.read(SOAPMessageUnMarshallerHTTP.java:91)
at org.jboss.ws.core.client.transport.NettyClient.invokeInternal(NettyClient.java:193)
at org.jboss.ws.core.client.transport.NettyClient.invoke(NettyClient.java:121)
at org.jboss.ws.core.client.HTTPRemotingConnection.invoke(HTTPRemotingConnection.java:150)
at org.jboss.ws.core.client.SOAPProtocolConnectionHTTP.invoke(SOAPProtocolConnectionHTTP.java:69)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternalSOAP(DispatchImpl.java:247)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invokeInternal(DispatchImpl.java:170)
at org.jboss.ws.core.jaxws.client.DispatchImpl.invoke(DispatchImpl.java:133)
... 6 more
Caused by: javax.xml.soap.SOAPException: Unsupported content type: text/plain
at org.jboss.ws.core.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:274)
at org.jboss.ws.core.soap.SOAPMessageUnMarshallerHTTP.read(SOAPMessageUnMarshallerHTTP.java:83)
... 13 more