I have been battling to get a form to work, eventually the problem was found to be two business objects on different pages of a page frame were set up as the primary business object. It appears that there "Can be only one!" is this true?

The form now dies when I add an option button group, last time I tried this I traced the code in the debuger and it appeared to fall back to the read events statement. I think it had something to do with security even though the security option was disabled. Can anyone give me some tips on using option buttons on a form?