ive just got a GSA-4163A burner(my first dvd burner too btw) and first impressions arent too good. I bought a 50pk of 4x ritek dvd-r to go with it, and the burner doesnt seem to like it. nero says theres no dvd inside whenever i put one of the dvd-rs inside. But on the other hand, windows xp seems to detect it, as it always shows up with the box asking what you want to do whenever i put the dvd-r inside. anyone got any idea what my problem is?