pioneer 105 problems booting dvd-r

[there is light]

I seem to have these same problems, I have a 30003 version 4, with neo 2.2.
It works every time with cdr backups, even cheap unbranded, so I dont think it is the laser. But it wont boot dvd-r's, I use GTA 3 as an original high toc, use Memorex dvd-r, nero and Prassi, Pioneer 105, windows XP, I have used Region X and AR2 v2.
When I try to load the backup after the tray on the PS2 ejects the tray wont go back in on its own so I have to use the eject button to return it.
Is it me or is it Memorex.