Help with GUI Scripting Apple Logic Express 8

Hello All,

I am a real newbie to Applescript, ( literally started last Saturday ) but look forward to the joys, trials and tribulations. Just bought the Sal Soghoian book, and its already dog-eared.
I am presently working on a project that uses Logic Express to provide an 8 zone multitrack audio playback scenario, that is to say playing a randomly selected audio track from a list of 10-12 audio montages each of 2 minute duration.
Trigger is from a Passive Infrared Detector, using Indigo automation software to trigger an Applescript. So far, I have been not had any success in the use of GUI of scripting on Logic Express 8.
Specifically, the following script :

activate application “Logic Express”
tell application “System Events”
tell process “Logic Express”
delay 1
tell button 11 of window 1 to perform action “AXPress”
end tell
tell process “Logic Express”
delay 1
tell button 6 of window 1 to perform action “AXPress”
end tell
end tell

Button 11 is the “return to beginning” button
Button 6 is the “play” button
What happens is that the application opens, it becomes the frontmost app, and I can see the actual buttons changing color on the Logic Express window indicating buttons are pressed, but nothing happens - playback does not start.
Manually Clicking the button with the mouse starts playback, but not with the script ?

Am I misunderstanding something here ? or is Logic Express realy not scriptable by GUI scripting ?

Any help would be greatly appreciated. ( Please be gentle on this Newbie )
Best Regards

Model: MBPro, 2.5Ghz Intel Core 2 Duo, 4GigRam, 200G HD
AppleScript: Script Editor 2.2.1
Browser: Safari 525.27.1
Operating System: Mac OS X (10.5)