Autorun problem with px116a

hi everybody!

nice greetings from vienna! ;]
i have following problem:
i own a plextor px 116 a (dvd- and cd-rom-drive). i hate to wait for the autorun startup. so i decided to turn it off by regedit…
i changed the binary-value of HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Cdrom/Autorun DWORD.
and it actually works…nomore autorun…
but at the same time i’m not able to read any data from any cd-rom
windows keeps on saying…that the format isn’t right…which is not true…because i can read the cd when autorun is turned on

so does anyone here know some advice?