Checkbox Problem

I have a checkbox in a grid. The column and the checkbox control source are both set to the same field in the table. The table is open in the data environment with BufferModeOverride set to 5, optimistic table buffering. If I put the TableUpdate command in the InteractiveChange method of the checkbox any change is not committed but if I put the identical code in a button instead then the change is committed. What am I doing wrong? :-(

John

John Weller 01380 723235 07976 393631