Ok... Finally got my liteOn 40125s flashed to Zs0k.
Though i don't think it has anything to do with the flashing my drive automatically closes the cd tray when I have ejected it. If Nero ejects it after a succesful burn - it stays out just as it is supposed to do, but when I use the eject button it closes again.
It's quiet funny i have to grab it quickly, and after a litlle wrestling I win and it stays out. Well, anybody knows a solution?