Problem with AVI-MUX GUI

I am having some sync problems after burning avi to dvd using ConvertXtoDVD ver3…Everyone seemed to rave about using Ave-Mux Gui…so thought I would give it a try…I downloaded it from several different places, unrared it, but everytime I hit the .exe file to open it, I am getting an memory exception error…what is all that about? :sad: