BizTalk - WcfSendPort - BtsActionMapping - is invalid

I have been getting the below error when sending request message to oracle db from biztalk 2009 R2

The adapter failed to transmit message going to send port "WcfSendPort_OracleDBBinding_SCHEMA_View_VIEWNAME_Custom" with URL "oracledb://CONNECTIONSTRING/". It will be retransmitted after the retry interval specified for this Send Port. Details:"Microsoft.ServiceModel.Channels.Common.MetadataException: Argument <BtsActionMapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Operation Name="Select" Action="http://Microsoft.LobServices.OracleDB/2007/03/SCHEMA/View/VIEWNAME/Select" />
</BtsActionMapping> is invalid.
Server stack trace:
   at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndRequest(IAsyncResult result)
Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at System.ServiceModel.Channels.IRequestChannel.EndRequest(IAsyncResult result)
   at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.RequestCallback(IAsyncResult result)".

Scenario: i auto generated schema from oracle db view. created orchestration(file receive-db req-db resp - transform(for final resp) - final response). deployed on biztalk 2009 successfully.
created output instance from the adapter generated schema with root reference "Select"

<ns0:Select xmlns:ns0="http://Microsoft.LobServices.OracleDB/2007/03/SCHEMA/View/VIEWNAME">
  <ns0:COLUMN_NAMES>*</ns0:COLUMN_NAMES>
  <ns0:FILTER></ns0:FILTER>
</ns0:Select>

used this xml in file receive location.in db req stage it is stuck . checked the binding, everything is fine since i imported the binding from the project i never suspected the <BtsActionMapping> tag.
changed EnableBizTalkCompatibiltyMode to True & UseAmbientTransaction to False. still no luck.
created a new DB request-response port removed the imported binding port.changed EnableBizTalkCompatibiltyMode to True & UseAmbientTransaction to False.didn't forget to set credentials username in CAPS,in SOAP Action header added only

http://Microsoft.LobServices.OracleDB/2007/03/SCHEMA/View/VIEWNAME/Select
without <BtsActionMapping> tag.

tried again

voila it works!!!