Data Marts extraction

Hello,

We are upgrading our BW system from BW 3.1 to netweaver 2004s SP17. In our system we use infocubes as Data Marts and update data from one infocube to the other. When I check the infocubes datasources 8* in RSA3 I'm getting 0 records although the datasource infocube is full. I tried to generate export datasource but it still not working and I'm getting "0 data records selected".

Please Advice,

Amir