Workflow Activity Completion

I am trying to complete workflow assignment with AML but it is acing weird.   My request xml looks like given below: <Item action="EvaluateActivity" type="Activity"> <Activity>DE33049EBA694267A44CA41A002E7C51</Activity> <ActivityAssignment>99E2CFE208154E4FBD70E75DE6AB4B74</ActivityAssignment> <Paths><Path>2312B2C556DC4C028F740433E629C934</Path>Submit</Paths> <DelegateTo>0</DelegateTo> <Tasks><Task Completed="1">03D548CE54834C27BDB7974175C8A43F</Task> <Task Completed="1">DEB21FCD697942DC91DFCBECB21747A4</Task></Tasks> <Variables><Variable id="451171CA8A144AD8B87E065216208B02">vb cvbnvxn</Variable> </Variables> <Authentication mode=""/> <Comments>xcbxcvb xcxcbx</Comments> <Complete>0</Complete> </Item> My response reads like the following: <SOAP-ENV:Envelope><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>SOAP-ENV:Server</faultcode><faultstring>The action "",EvaluateActivity is not supported.</faultstring><detail><af:legacy_detail>The action "",EvaluateActivity is not supported.</af:legacy_detail></detail></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>   Further more response in nash with the same request is following: <SOAP-ENV:Envelope xmlns:SOAP-ENV="">schemas.xmlsoap.org/.../"><SOAP-ENV:Body><SOAP-ENV:Fault xmlns:af="">www.aras.com/.../faultcode><faultstring><![CDATA[Failed to get the Activity Tasks.]]></faultstring><detail><af:legacy_detail><![CDATA[Failed to get the Activity Tasks.]]></af:legacy_detail><af:legacy_faultstring><![CDATA[Workflow: EvaluateActivity: Specified Tasks are not found for Activity]]></af:legacy_faultstring></detail></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>   I looked at the request xml using Admin->saveRequest setting and my xml matches with what is sent by the official client. What am I missing?