Hey!
I have an LG GSA-H55N dvd drive and lately I've been experiencing problems during burning and reading double-layer discs. I updated my system this July from Win XP to Win7 and since then I cannot read my previously burned DL discs (I used Nero 6 and now I use 10). I just put them inside the computer and it doesn't recognize them. A green light continuously flashes and the disc is spinning inside but no sing of the dvd on the screen. Actually sometimes it decides to read them and I have no problem browsing my dvds but that's extremely rare. When I used Win XP none of these problems occurred. I've updated drivers, firmware (there's no for win7 yet) I've downloaded countless drive-checking programs but no luck. Yesterday I tried to burn a *.iso on a dl disc and it stopped at like 30% and made the dvd useless. I don't know what the problem is. :/
Please, can you help me?

P.S. It has no problems with regular DVDs. I burned a lot just a few days ago without a problem. And I installed Nero only 6 days ago when I started to free space off my computer. Alcohol 120% also had problems burning a DL.