no, that's ok (for the previous misunderstanding)
Actually, I can't access ONE of them. I mean seven out of eigth are checked by my function but only one remain unchecked.
There are 2 rows of 4 checkboxes and the one I can't access is sometimes the second of the first row and sometimes the second of the second row.
+ + + +
+ - + +
or
+ - + +
+ + + +
Weird isn't it !