Comm Channel Problem---- javax.ejb.EJBException

Dear ALL

When I am creating a Sender communication channel, using ftp protocol, my file is not being picked up.

Communication channel monitoring reveals the follwoing error in my comm channel.

I don't know how to get rid of it

Kindly help...!!

Error: javax.ejb.EJBException: Exception in getMethodReady() for stateless bean sap.com/com.sap.aii.af.appxml|com.sap.aii.af.ejb.jarxml|CallAdapterWithMessageBean; nested exception is: com.sap.engine.services.ejb3.util.pool.PoolException: javax.ejb.EJBException: Exception raised from invocation of public void com.sap.aii.af.app.modules.CallAdapterWithMessageBean.ejbCreate() throws javax.ejb.CreateException method on bean instance com.sap.aii.af.app.modules.CallAdapterWithMessageBean@296eb8f9 for bean sap.com/com.sap.aii.af.appxml|com.sap.aii.af.ejb.jarxml|CallAdapterWithMessageBean; nested exception is: javax.ejb.CreateException: com.sap.engine.services.jndi.persistent.exceptions.NameNotFoundException: Object not found in lookup of SapXIJDBCAdapterService.

Regards

Azahar