Annoying Mouse Wheel unreliability issue

Heya folks,

I hope someone can help with my problem which I have had since I upgraded my machine with an NF3 MSI Neo2 Plat mobo and installed Win XP SP2. The problem is that my mouse wheel only works for 1 or 2 reboots after plugging the mouse in. My mouse is a Microsoft IntelliExplorer 4.0A (wired optical one) and I have a Logitech Internet Navigator keyboard (one with a load of extra buttons including a mouse wheel itself) If I unplug it and plug it back in it works fine. I've tried switching my keyboard and mouse between usb and ps2 with no difference and have tried it with and without drivers. I have also tried disabling the USB internet keyboard keys in human interface devices hoping to disable the keyboards extra functionality (which it does) but the mouse problem persists!

I suspect its something to do with the keyboard mousewheel but even by disabling it, there are problems. I've tried enabling/disabling the USB keyboard/mouse support in BIOS but these make no difference either. All microsoft help is completely useless as is logitechs, it seems no one else has had this problem

Help!