Is my sony dvd rw dw u54a as bad as i think it is?

my sony dvd rw dw u54a drive wont read most dvds wether they are videos, data or blanks to be burned. it seems to be ok with CDRs. i cant seem to find any answers anywhare about this. I bought half life 2 which is a dvd rom disc and it dont work on it. I have found some threads on it in your web site but lost them again!!! I also see there is a sony dvd rw dw u54a (V2) driver new driver. is this for my dvd drive and will fix the problem or is it for a new drive sony made? please help! the drive is in my viao PCG-GRT915M