Nope, it wont read new Ram discs either.
The problem happended when i loaded TMPGEnc DVD Author (express version). it read a couple of dics and then ground to a halt. it kept asking for a dics to be inserted into the drive even though there was a RAM disc present.
A few days later i went to the LG site and down loaded driver A105, but i think i had this already. this made no difference.
So i can only assume TMPGEnc DVD Author has corrupted my software somewhere.