True Dbgrid 6 with VB 6 - Aftercoledit event does not work

Question

Hello, in a VB 6 application, using True Dbgrid 6:

1. type a code in a column;
2. when I change column, I do a database search to bring the description of this code. In the event Aftercoledit();
3. on my machine and some others it works. But on other machines this event Aftercoledit does not fire. I checked on these machines with problem, and the OCX tdbg6.ocx is the same as my machine.

Any idea what does not trigger this event on some machines?

Thank you