2LIS_02_SCL not capturing all PO's

In MM We are using the 2LIS_02_SCL and 2LIS_02_ITM datasources.

2LIS_02_ITM Captures all the PO documents in the source system but 2LIS_02_SCL not capturing all the PO' documents.

If any one came across the same situation pls help with your inputs to get all the PO documents using 2LIS_02_SCL..It would be great helpful..

Thanks in advance.

Regards

Ganesh