I'm deploying an application on Jboss 4.0.3. This application constructs a SOAPMessage with an attachment using SAAJ api. The message seems to be correct, but when I do a

SOAPConnection.call(SOAPMessage, url)

I get the following error:

FATAL [org.jboss.axis.Message] InvocationTargetException:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at org.jboss.axis.Message.setup(Message.java:333)
at org.jboss.axis.Message.(Message.java:212)
at org.jboss.axis.client.Call.invoke(Call.java:2054)
at org.jboss.axis.soap.SOAPConnectionImpl.call(SOAPConnectionImpl.java:125)

....
....
Caused by: java.lang.ClassCastException: org.jboss.axis.message.SOAPEnvelopeAxisImpl
at org.jboss.axis.attachments.AttachmentsImpl.(AttachmentsImpl.java:134)
... 93 more

I noticed that there is no error If I send the message without any attachment:

AttachmentPart att = message.createAttachmentPart(
mimeMultipart, mimeMultipart.getContentType());
att.setContentId("multipart-content-id");

soapMessage.addAttachmentPart(att);

Previously I had deployed this application on Jboss 4.0.1 and everything worked fine