>>>>No, and nobody tells me something like that (I mean from out QA department).
>>>
>>>I may send you this form and two extra classes needed, so you may see, if you have the same problem (mouse pointer changes to hourglass and back on each click on the checkbox) if you want.
>>
>>Sure.
>
>Thanks, I sent you the zop (renamed from zip) file.

I got it and played with it.
Set initial value of the check to be .f. (not 0) and remove all code from its events :-)