FM7: protect checkbox from being modified

[PatriciaW]

I've got a layout in which I have a portal which has two different checkboxes. All of the fields on the layout are supposed to be readonly. I unchecked both enter in browse and find. However, when I use this form I can uncheck one of the fields but I cannot check it. The other field cannot be modified at all. I've also set the layout without automatic updates but that only means I get a reminder to save the changes. What is allowing this to happen? Both fields have value lists which are identical (as far as I can see) with one value of "Yes".

What am I overlooking?

[Fitch]

Maybe the checkbox in question has a script or script step attached to it?

[PatriciaW]

That was it ... I'm very grateful to you for that hint. I have removed the script but I wonder how I could have disabled it on a "readonly" form? I didn't need it there ... I think I may have copied it that way from another form.