Sony 16x 650mb wont work

i bought a lot of these cdrs. they worked at first. but now they wont allow me to burn any slower than 12x and not any higher than 12x. i keep getting medium error in clone and power calibration error in nero. this only happens at the start and luckily does not burn anything. my ricoh cdrs work much better and i can burn at any speed. is it just a case of poo media?

Sony 650mb 16x
ATIP info from disk - Read by Feurio 1.65
Recorder: RICOH - CD-R/RW MP7200A
ATIP start of lead in: -02:35:64 (sector: -11689)
ATIP start of lead out: 74:43:00 (sector: 336225)
Manufacturer code: 97 24 11 - SONY Corporation (Type: 1)
Disc subtype: Medium Type A, low Beta category (A-)
Target writing power: 5

Turn off laser power calibration.

Make sure that you have actually installed the programs for the OS you are using them on, and not using a version which was installed before updating your OS.

I had the same problem. Using different copies of NERO/CLONECD for different OS’s worked.

Originally posted by debro
[B]Turn off laser power calibration.

Make sure that you have actually installed the programs for the OS you are using them on, and not using a version which was installed before updating your OS.

I had the same problem. Using different copies of NERO/CLONECD for different OS’s worked. [/B]

nah i didnt update os or anything like that and i tuned off laser power calibration also.