Dvd drives not recognized after upgrade past version

i have sony DDU-1622 and sony DRU-710A drives. every time i upgrade to versions after the drives will not see/recognize the dvd is in the drive. i can restore back to the version and no problem with the drives seeing/recognizing the presence of the disc. this is driving[no pun] me crazy and thats a short trip for me. i am sort of a newbie; but i have always rebooted after the upgrades like i should, and i read a follow instructions when displayed. PLEASE HELP