keyboard problem, remapping

Hello, I am having a keyboard problem that doesn't seem to be the keyboard's fault.

Problem:
*When I press Right Control, Left Arrow, and Up Arrow together, only two of the actions occur (like in games).* When the keyboard is connected to the PS/2 port, my pc speaker beeps when I press this combination. When connected to a USB port, no beep. I have tried an older keyboard and this combination wouldn't work on it either.

Environment:
WinXP Home
Asus P4T-E BIOS 1005

I wonder if someone can help me, or tell me how to remap the Control keys where the left becomes the right and the right becomes left.

<A HREF="http://www.anandtech.com/mysystemrig.html?id=16533" target="_new"> My System Rig </A>

wouldn't it simply be "My Rig" ?

"My System Rig" is like saying "My Penis Cock"

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