I have AH which I been using for years with minimal problems, also have firecracker on this PC, also with little trouble. I just installed Vanguard with the VA12A and now AH and firecracker does not work at all! With AH I get" invalid com port selected",and "com2 not valid com port", with firecracker it just does not work no error message. When I first installed and used Vanguard it seemed to work ok, but crashed three times after opening it again. Now when I start Vanguard just get a black screen no picture and upon closing it I get this message " Run a DLL as a APP has encountered a problem and must close" and the Vanguard closes or crashes. I tried to uninstall Vanguard and reinstall it, same result. Why would Vanguard keep AH and Firecracker from working even though it is not running? Is there another software that will work with AH and Firecracker and not conflict with it? I"m using windows XP, and an old version of AH not AH Pro. Help!!