An Update that doesn't update

I have a rare problem. I'm using VB5 with RDO and when I change the value of a memo field (and update it), this doesn't update.

But if I add a stop statament before and after the update line (with nothing more) the update works well!

Stop
Resultset.Update
Stop

A simple DoEvents statament doesn't work.

Any idea about it?

Tonatiuh