Error with burning to dvd

recently i have been unable to burn data of any kind mp3s,mp4s etc to dvd like i normally do, i can normally burn anything with my combo of dvdany, dvdshrink and nero 7, but recently whenever i try to load a dvd and add files to a burn list on nero the program automatically stops responding i tried it with other software too like cheetah burner and that does exactly the same it stops responding as soon as you put a dvd in the drive and i actually have to use the end now option to get if off the screen but i can still burn cds okay so i am confused? i am happy to buy a new dvd burner as long as it fixes the problem but im not sure if it is that or something else, please help.

also i guess it helps to know the drive does still play dvds too so i guess that means the lasers ok, which is why i think its not the actual burner causing the problem.

You are using Nero, so your first try should be to contact the creator of Nero, Ahead.