weird error message on FLY!2K startup

I've had FLY!2K for years, and never had this problem before.I usually start FLY from the SKY! menu. The loading of FLY begins, and then stops. This error message appears: Subsystem is not registered...C:flightflightcirc.cpp, and then another window saying that fly.exe has created errors and will shut down.Starting FLY from its own desktop icon leads to the same phenomenon.Is this related to the wormblaster virus which came my way, and which I've cleaned up.My FS2002 was not effected, neither was FLY!2 affected- only FLY!2K. I actually prefer using the latter since it's more stable on my system.EytanP3 450GeForce 200 MX 64 MB256 RAM