Problem during data extraction

hi all

need ur urgent help

my prolem is as stated:

1) For datasource 2lis_02_scl (sap r/3-MM), im unable to extract data for PO's related to SRM Orders.

2) For other PO's im able to extract data

pls let me know if there are any settings in IMG to be done for PO/PO Document type in order to solve this issue

thanks

JPBW