Data is not getting posted thru posting key 40 and 50 in f-02

Dear Techis,

I had created bdc for T code F-02 data is getting saved and posted for other posting keys like 25 35 29 etc but wen document with Posting key 40 and fifty came i have to manually by vlicking save button saving data ... m using session method anybody pls help me out..

pls try to giv me BDC CODE FOR saving document thru BDC

Its urgent..

Thanks in advance..

Every helpful ans will b rewarded with points..

Regards

Shovan.