I just recieved my replacement dvd's and used LIC cardio premix. It kept freezing and stalling. Anyone have trouble with the replacements? I have a new tv [so that can't be the problem] and must add that I have used the original B&G w/ no problems. Funny that my first problem would be with the replacements. [I have never ever used the premix option on any video so maybe it's limited to that area???]