[BEGINNER] What could cause a radio button not to hilite?

[Shawn Blc]

[BEGINNER] What could cause a radio button not to hilite?

In my property profiles I have the group enabled, select grouped controls,
hilite one radio button at a time, etc.  Same properties as a previous
card, but for some reason on this card I can't hilite a radio button.

Any ideas on what could cause a radio button not to hilite when clicked?