DVD+RW cant read discs

I was burning a movie, when i accidentally click the standby button on my keyboard. Now, i can read CD-R or DVD-R discs. When i put the disc inside, it says 0 bytes free of 652 MB. However, when i click on it, it gives me the window version CD burner app. Does any1 know how to fix this. Thx.

OS : Windows Vista
DVD : Lightscribe DVD supermuliti Drive/ CD Writer (letter E)