3DConnexion SpaceExplorer - Sluggish response

New 3DConnexion SpaceExplorer USB connection providessluggishperformance. I have tried re-installing drivers etc.Contactedsupport at 3DConnexion and they have not been helpful.Here is theworkstation configuration, IBM 6230-56U, nVidia FX1100,WXP sp2,SWX2006 sp4.1. I have moved the SpaceExplorer to otherworkstationswith nVidia FX1000 or FX1400 and it works. Anysuggestions orfixes?SolidworksUser Interface