check ur dirext x and upgrade if need be , if ur using vista try setting AM to run in admin mode , or set it to run as if in xp , do this in it compatbility tab. try fully uninstalling AM running a registry cheker ( suggest the safety scanner at www.onecare.com) then reinstall, check and see if ur anti virus may be blocking parts of AM. check your video cards drivers and update if nessisary , check and make sure ur AM version is not to old. umm thats all i can think of for know