Script Triggered From A Pop Up (Again!?)

Sorry to bring this topic up again, but I seem to have a problem that no-one else has experienced?

The same scenario, I have a field which uses a value list displayed via a pop up MENU. A script is attached to the field, which is intended to transport you to another layout based upon the choice. The script is as follows:

Goto Field 'Pop Up'

Pause/Resume

If ["Pop Up" = "A"]

Goto Layout ["Layout A"]

Else

If ["Pop Up" = "B"]

Goto Layout ["Layout B"]

End If

End If

The problem is:-

When using a pop up MENU (On the Mac), the user has to click the field/button twice to get the menu to appear in order to make a choice. I can get the same script to work with a pop up LIST with a single click, but not the menu. I prefer the pop up menu as it blends with the OS X theme.

The problem with the pop up menu only appears on the Mac client, a PC sharing the same database works like a dream!

Any Ideas??

I am using FM5.5 in OSX if this makes a difference.

Thanks

Matt