BAPI_SALESORDER_CHANGE not updating database

Hi,

I am using BAPI_SALESORDER_CHANGE to change the target quantity ( ZMENG ) of the Standard sales order.

I am getting no error message in the bapi return table but the data is not getting updated in the database.

I am also calling commit work 'BAPI_transaction_Commit'. Please let me know if there is an alternative to this BAPI. I have tried BAPI_SALESDOCUMENT_CHANGE also.

thanks,

Hitanshu