sql does not work after changing data with BAPI

Hey all

I am using bapi 'BAPI_REQUISITION_CHANGE' to change the the data in EBAN.

then on the successfull execution of the above bapi, i am using an sql query to change one customer field in eban.

the Bapi works fine but the sql query does not modify any data. although i am using commit work.

if i put a break-point after bapi then the sql works fine.

any ideas.??

Regards,

Tarun