Proxy Error while consuming backend web service

Hello,
I try to consume erp backend web services (generated on existing rfcs) with a web dynpro (java) application and get the following error:
Service call exception; nested exception is: com.sap.engine.services.webservices.jaxrpc.exceptions.InvalidResponseCodeException: Invalid Response Code: (502) Proxy Error ( The ISA Server denied the specified Uniform Resource Locator (URL). ). The requested URL was:"http://anyExampleUrl"
The called backend service and the portal server reside in the network so no access through the ISA server is required. Consuming the same services by .NET applications works fine.
Do you have any hints?
Cheers, Dennis
Edited by: Dennis Isaak on Sep 23, 2009 2:18 PM

Hello there,
Check the same webservice is working fine with a SOAP UI, especially the request and response are fine. Then try with the application.
Regards,
Vivek Nidhi.

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