how "use stack panel" works

[RGould8 at aol.com]

I'm trying to create an option menu that when selected, displays a list of 
colored boxes, with the color-names next to them in field-text.   I've so far 
been able to get the menu to display via the "use stack panel" selection in the 
properties of an OPTION button.   I then make another stack called "colors", 
and point the "use stack panel" option to that new stack.

My question is, how do I get the selections out of that new stack back into 
my main stack?   I'm finding that if my colors stack's text field has this 
script:

on mouseMove
   set the hilitedLine of field "colors" to word 2 of the mouseLine
end mouseMove

on mouseUp
   answer "mousedUp!"
end mouseUp

that this script runs fine when in editing mode, but when I run it, nothing 
happens - - - no line hilite in the field, and it doesn't appear to detect 
mouseUp.

I did a search in the archives for "option button use stack panel", but it 
didn't bring up any examples of how to make this work.   Any help is greatly 
appreciated.