Question on volume control

[Steven DeWitt]

Hi all,

Possibly a dumb question: a few days ago, I noticed that when I press  
the "volume up" or "volume down" button on my keyboard, the volume  
bar appears on the screen but with a symbol underneath (circle with  
line through it) to indicate that the keys were disabled. (I was able  
to change the volume by clicking on the volume symbol at top right of  
screen with no problem.) A few days later, I was suddenly able to use  
the keyboard buttons again, but now today suddenly the problem has  
reappeared. How can I make it so I can use the keyboard buttons again?

Thanks,

Steven


-- 
Steven DeWitt, C. Tran. (FR>EN, ES>EN, en>fr)
Fredericton NB CANADA
mail [at] stevendewitt [dot] ca