Processing outbound Idocs

Hello Guru's,

The system here is setup in such a way that whenever a shipment is created for a delivery, an idoc is creted and transferred immediately. I.e the status of the idocs will be -

Status - Meaning

01 idoc generated

30 Idoc ready for dispatch

03 Data passed to port OK

18 Triggering EDI system OK.

The issue is sometimes some of the idocs are being generated and are staying in status 03. Why is this happening and what could be done to avoid this. Is there any SAP program to process all the status 03 idocs to status 18 or status 20.

Please help me.

Thanks in advance.

Regards,

Balu