invalid identifier

Hi Experts,

I doing a interface HTTP--JDBC synchronous.While i test the scenario, i'm getting the following error

Result:

<SAP:Error><SAP:Category>XIAdapterFramework</SAP:Category><SAP:Code>MESSAGE.GENERAL</SAP:Code><SAP:AdditionalText>com.sap.aii.af.ra.ms.api.DeliveryException: Error processing request in sax parser: Error when executing statement for table/stored proc. 'kss_activity_stg' (structure 'STATEMENT'): java.sql.SQLException: ORA-00904: "KEY": invalid identifier

</SAP:AdditionalText></SAP:Error>

Can you please help me out in this regard?

thanks

Pravin