Accessibility for Vision Impaired

I have a new employee who is vision impaired and I need to set up the screen magnifier and the desktop zoom in SLED 11 SP3. We are currently defaulting to KDE and I cannot get anything to work. I have tried configuring compiz both under KDE and gnome, but still no luck. The supposed key combinations (button4, etc) bring up menus but no zooming.

TIA
-L

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