Hi,
I have a really not so funny effect with my system.
Does anybody did ever have something similar and what could be the reason?

The problem is that my mouse stops working when running ANY game/demo (3dfx Donut) that uses the Voodoo 2s in SLI mode.
The system starts lagging seriously an no mouse movement does appear any more right after starting a program. It first fall in my eyes with Quake II while I tried to get the game's CD music from an ISO mounted with Deamon tools to work. The mouse stopped working at all right after starting the game. At first I thought it would be just a Quake II issue but the problem persists in any application that runs in SLI mode. The mouse's (Logitech MouseMan Optical Dual) sensor lights completely go off and that's it.

The "funny" thing is that the mouse starts working just normally again when I leave the program and enter desktop (without dis-/reconnecting it).
The programs also run normally again when I disconnect the mouse while they are running. No lags, nothing. Only with no mouse.
And: this effect seems only to appear with this special one mouse. Any other mouse I tested works completely normal.
Also when I disable SLI in the drivers everything works as before.
So it seems to be the combination of SLI and this special mouse. WTF...!?!?!

I already removed/reinstalled daemon tools, the Logitech mouse driver, Direct X, the Voodoo 2 drivers. I removed any USB device from hardware manager and restarted the system a houndred times. Also tested both Voodoo II cards on their own (both are good). I don't have any clue what's going on.
The system always worked with this mouse and SLI, whatever game or progam was run on it.

Just thinking about reinstalling Win 98...

Any ideas?

Thanks.