Error in RFC adapter

Hi,

I get the following error when calling the BAPI_PO_CREATE

from using RFC receiver

Exception caught by adapter framework: RfcAdapter: receiver channel has static errors: can not instantiate RfcPool caused by: om.sap.aii.af.rfc.RfcAdapterException: error initializing RfcClientPool:com.sap.aii.af.rfc.core.repository.RfcRepositoryException: can not connect to destination system due to: com.sap.mw.jco.JCO$Exception: (101) RFC_ERROR_PROGRAM: Language 'English' is not available

I have changed the logon language to EN from English and activated the objects still the same error occurs.Somebody please let me know if you know about the error.

Best Regards,

Arun