Conditional Formating with Checkboxes

[sp00k]

I have a field that I want to color if the checkbox is selected.
I have [MntConfA]="Yes" (format the text green), [MntConfA]="No"(format the text orange) so far, which worked with a drop down list. but is not working with a check box. Any ideas? i've tried using true/false but to no avail.

edit: MntConfA is the checkbox and I'm using the conditional formatting in the field i want the color to be changed

 

[wiremonkey22]

Have you tried -1 for yes and 0 for no