Zooming in mac osx 10.5

Hey there,

I hope someone of you guys can help me out:

First of all the zoom function is a verry nifty tool in the mac os, just press option and command (alt and apple icon) and use the mouse weel to zoom in or out on your screen.

But! This function stopped working for me! I can still zoom with the -/+ buttons, but not with the mouse weel anymore.
Has anyone of you ever accured this? And how did you fixed it?

Hope someone has an answer

Greetings

Mydea

Refer to this video which explains how to change the modifier key to zoom into your screen. Make sure that last option "Use scroll wheel..." is checked off