Error deploying custom EAR file from NWDS to Portal 7.4

Hi All

I am trying to deploy a custom EAR file to our Portal 7.4 SP7 system. The EAR file was a PAR file running correctly on the old system EP 7.0

I migrated it to PAR using the support tool, and while deploying it on the server using NWDS 7.31, I am getting errors

Exception occurred during the 'Deploy' operation.
Cause:Cannot obtain deployment client
Exception:
com.sap.ide.eclipse.deployer.api.APIException: Could not retrieve deployment system configuration for EPX. Please check if the system is running.

Yesterday only we change the SDEFAULT parameter to DEFAULT and rebooted the EP servers couple of times. The server does not ask for OS level User ID anymore, but I cant seem to deploy ears from NWDS

Any help.

Thanks

Sandip