Task ws-tools can not load the wsdl on Windows

[INFO] An Ant BuildException has occured: The following error occurred while executing this line:
C:\code\jbossws\stack\native\trunk\modules\testsuite\native-tests\scripts\antrun-wstools.xml:44: The following error occurred while executing this line:
C:\code\jbossws\stack\native\trunk\modules\testsuite\native-tests\scripts\antrun-wstools.xml:99: Error running jbossws:

Cannot load wsdl: C\:\\code\\jbossws\\stack\\native\\trunk\\modules\\testsuite\\native-tests
target/test-resources/../wstools/resources/jaxrpc/samples/wsbpel/hello/WEB-INF/wsdl/hello-service.wsdl