Not allowing me to burn at max speed...Please Help!

i have a 24x cd-r drive…i got new cd-r’s yesterday that say 52x, but the problem is that when i use nero to burn a cd it only lets me choose 4x or 8x. is there an update i am missing or what. before these cd’s i have always burned at 48x-52x…someone please help!!!

Sorry, if I misunderstood.

Are you saying that you burned at 48x with a 24x burner?