>BTW. I am using the txtbtns class from VFP5 to control add/edit/delete/ and scrolling of the records.
>
>In my DE, the parent and child table are buffermodeoveride=5 (optimistic), but the form buffermode is set to 0, default. What do you suggest about this setup?

You might check the buffering (through the debugger) AFTER you've moved the record pointer. I don't know the code behind the txtbtns class at all, so I can't say WHAT goes on.