clone cd

[mikmonty]

hi can anybody help me? ive been using clone cd for sometime now
and now iam starting to get errors
iam using plex reader and writer , i can read and make a image but copying is where iam getting problems its coming up with
meduim error and something about error recovery?
i never had this problem before can you please help?
RIGHT THIS IS WHAT I GET
WRITING TO CD FAILED MEDIUM ERROR:WRITE ERROR-RECOVERY NEEDED (3:0x0c: 0x07
Ive just dropped down to 8 speed and it was ok
can anybody tell me what ive got to do so i can start copying at 12 speed again?iam using same blanks that i was using before errors but i have just change to some thing else