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I tried to change the Driver couple of times, with no success.
the mouse is not listed in the DirectInput Device, but is appearing in Input related device under PS/2 Devices (although its plugged in USB).
One more thing, while I change the tab to Input in the dxdiag, It show me a message:
"Error: Problem getting input info, result code = 0x80004005 (Generic Failure)"

I downloaded many games I would like to try but every time I get the message:
"no mouse was detected on your system, or your mouse is not configured to work with DirectInput".
Of course I have a mouse, and I tried to install DirectX9.0c and restarted the computer with no success.
I am working in Windows XP SP3, Pentium E5300 (Dual Core).
I will be glad for any help, since I found no related topic for that problem!