Hello again Carim,
<snip
I found a solution : include two additional Locked CommandButtons
( lower and upper bounds ) when building the group ...
for the Class module to recognize all the 20 Buttons in-between !!!
Do not ask me why it is working ..., I suspect the couple Excel 2000
SR1 with XP has not yet solved all of their ActiveX controls handlings ...

The reason your code was not working correctly before is because you had
done something wrong. It is not possible to suggest what you did wrong
because you have not given the details Rick asked you for, two times.

Although you may have fixed it, for now, I am sure the reason is not due to
what you say you suspect.

Regards,
Peter T