FF9 at 12x

[Burn]

I have a brand new Iomega 12x10x32x(rebadged Plextor). It has the 1.07 firmware. I burned a backup off an image of the first disc of FF9. I put it in my psx soon after burning it. It seemed to work perfect for the first use, the movies and sound did not skip, played smooth. I then restart the psx and do it again to see if the movies will skip and it started to skip in the movie intro to the game. It worked perfect the first time I used it now it skips all the time after on the movies making it unplayable. Did I use it to early after it popped out the burner? Should I have waited some time(20minutes?) for it to cool down before using the backup? I'm guessing the psx laser did something to the cdr. What you think?

I used 12x(has sticker on package saying support 16x) 80min/700mb Imations. I used CloneCd 2.8.2.1 with settings from CcdDatabase.

What's the use of 12x when quaility suffers? or is this the case for games with many cgi movies? Do you have problem burning your backups at 12x?

If I burn this game at 2x I know it should work perfect.