IDOC Problem

Hi all

Iam new to SAP ABAP.

When iam sending an Idoc to inbound it is creating suucessfully.

Because of some error in inbound server(Errors in EDI), i tried to send the same idoc again.Then It showing some error like "0 idocs creted" and "0 Communication channels created"

What may be the problem

Plz help me

Thanks

Sagar