Quark shortcuts on titanium pwbk

Does anyone have problems using the F7 and F5 Quark shortcuts on a powerbook? It seems that they're disabled because those keys control monitor setttings or something. If anyone knows how to enable them please please please let me know. The two shortcuts are the most frequently used and they don't work on a powerbook!

From Mac Help…
If you are using a PowerBook G3 or PowerBook G4, be sure to press the Control key first, then the fn key and the function key.

Thanks! I got these replies from another forum, if you want to check it out:

http://forums.macosxhints.com/showthread.php?s=&postid=113855#post113855

immdb said:

From Mac Help…
If you are using a PowerBook G3 or PowerBook G4, be sure to press the Control key first, then the fn key and the function key.

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