Try burning at the slowest speed you can or retune your laser
for the laser you need to open up you PSone and use the best fitting screw driver on the very small metal adjustable circle on the ribbon connected to the laser, it is located on the laser end of that ribbon.
do this very slowly if your turn it to far the laser will not read any CD but don't worry you can turn it back and everything will be as it was before
The thing you Adjust is pointed out in the images
Yeah there pictures of the PSX not the PSone but it's in the same place anyway