PMA Update Failure

[ksr_6]

i bought a new sony dvd writer dw-q28a. i could write a few dvds.
but now i get an error message saying "pma update failure" and
"cannot perform end of disc at once". what is the problem

[QwertyManiac]

try changin the disc at once mode to track at once and try... (tis in prefrences mnu)