Idoc error Status 37 ?

Hi friends ,

I am trying to send an invoice idoc from one client to another client . When i go and excecute / we19 / I get the following error.

Error : “IDoc 0000000000000017 was saved but cannot or should not be sent “

When I go to /nwe02 / it says

Status 37 : “IDOC added incorrectly “

EDI sender port in control record in invalid .

Please tell me where i am going wrong ?

Thank you