Problems with mouse

Hi,
it's a very old problem (for me), so I apologise if this was discussed before (but I couldn't find anything using search on this forum, google ect).
I am having some problems with my mouse pointer wen I use SI. It "goes crazy" sometimes (I suppose it happens when SoftIce activates while I am moving the pointer) - I mean I cannot control it anymore (but in SI window everything works fine) and system behaves ridiculously when I move my mouse (windows are "jumping", menus are popping, ect.). The only suggestion I've found was to press Ctrl+M in SI, but it doesn't work. It is really painful for me, because I have to restart computer to use my mouse normally.
I am using Windows 2003 Server (PL), SI: 4.3.1, my mouse: a4tech www-31. Does anyone have any idea how to fix this?