Problem while sending IDOC to File Senario

Hi Experts

I am having problem while sending the Idoc from SAP R/3 to File

I have done all the setting in SAP as well in XI but while pushing IDOC

I am getting error in the transaction sm58 in SAP R/3

" <b>The service for the client 300(My SAP R/3 client) is not present in Integration

Directory</b>"

I can any one explain me what to done on this....all the connections are fine

Waiting for Response

Adv points and thanx

Rakesh