Magic 3 problems?

[punkrockfan]

I have a ps 2 v7 and a magic 3 (i dont know the version)
And i am experiencing problems with booting cdr s ... i changed the medias to verbatim cdrs but its still the same ... somehow it often happens that the ps 2 logo flashs in for just a bit of a second and then the "insert proper ps 2 cd or dvd" screen comes.
Maybe its because i am burning too fast? (most of the time with 16 X ) i had the problem with dvd s too but just one or too times ...