Mighty Mouse doesn't right-click when ACD is connect

[artalliance]

This is the strangest thing. Right-click on my Mighty Mouse works flawlessly, but as soon as I hook up my ACD to my laptop, right-clicking ceases to work.
Any ideas greatly appreciated.

Here is my setup:

PB G4 1.5
ACD 23''
Mighty Mouse (wired, Version: 1.08)
Bluetooth Apple Keyboard

 

[twistedlegato]

Go to system preferences, and check to see that it does not change when you hook it up, if it does, just change it back to right click.

 

[artalliance]

Good idea, but it's set correctly to right-click.