Need help please problems with mad dog with cardbus all of the sudden



couple days ago i purchased a usb 2.0 cardbus for my laptop. with it i was burning at a good 4x and 20 min to burn,but now all of the sudden the speed is like 0.2x and taking like 8 hours why is that?? is it the burner? i have the mad dog 16x external. and i use dvd decrypter 3.5.2. and another weird thing is when i minimize the dvd decrypter the speed increases up to aleast 1.1x. is it the program? so i switched back to the laptops 1.1 usb and it use to take like 1 hour 20 min but now its over 2 hours. what could the problem be??could it be the cardbus,laptop,burner or the program??? and it says the cardbus device is working properly. what can the problem be everything was working perfect yesterday.


anyone know what the problems is???


pleaseeeeeeeee help meeee