Digital BW, The Print

I little bit off topic, but it sure would be like removing a pebble from my 
shoe if I could find this answer. I can load the image's luminousity by 
Ctrl(PC) or Command(Mac) clicking on the composite channel. I also used to   be able 
to   load the image's Luminousity with the keyboard shortcuts of: Ctrl/Alt/~ 
(PC) or Command/Option/~ (Mac). These shortcuts don't seem to work anymore on 
Phortoshop CS2. I have Photoshop CS on a PC machine and the shortcut: 
Ctrl/Alt/~ works fine. I just can't get it to work on CS2 on either PC or Mac. Does 
anybody know the keyboard shorcut to load the image's Luminousity in Photoshop 
CS2?
Steve 


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