>>
>>This is really strange...
>>If I add a new field, the OptionGroup appears enabled.
>>
>>Then I opened the FRX as table, and compared all the column values from the 2 records that bring the same value... They are identical !!!
>
>Is it possible that fields cross over into another band?

No...

Anyway, it's working now, there were only 3 fields that needed this option. I just dropped some empty fields, and configured them again.

Thanks anyway !