SSIS Web Service Task error : SQL 2005

On my dev machine every thing works, When i put my SSIS on QA server for testing, I get following error . Customer has only SQL 2005. Please provide any input on how to resolve this issue. I provided HTTP URL as .asmx?WSDL    already in config file.

  Code: 0xC002F304
   Source: Log Start Message to Process Manager Web Service Web Service Task
   Description: An error occurred with the following error message: "Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebserviceTaskException: The input Web Services Description Language (WSDL) file is not valid.
   at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTaskUtil..ctor(Object connection, String downloadedWSDL)
   at Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTask.executeThread()".
End Error
DTExec: The package execution returned DTSER_FAILURE (1).

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Moonis Tahir MVP, MCPD, MCSD.net, MCTS BizTalk 2006/SQL 2005/SharePoint Server 2007 (Dev & Config)