HL-DT-ST DVDRAM GSA-4082B cant read nor burn, help pls



ive got it connect as a slave to a master (AOPEN CD-RW CRW5224)

the last time i used it to burn a dvd-r was about 1 yr ago. but several months back both drives started to give me problems. they won’t work, and i had to reboot till they worked. now it seems that my dvd drive cant read anything at all, while my cd writer is fine.

the last time i used the dvd burner was at least 6 months ago because i wanted to minimise the usage on it while using the cd writer more.

can anyone help?