Software Moron needs help

[cplape]

ok I am not very good at this, the facts
PC running XP (laptop)
3G 16 gig
iTunes
DVD43 current version
Handbrake current version

I load the dvd and the little smileface in the app tray turns green DVD ready
I start handbrake (pre sets set for iphone) when I browse for the source i go to w:/ (my dvd rw drive only dvd drive on the laptop) and it shows up as video ts
I set my destination as My dvd Folder and name the file and save as a mp4
hit start and the black screen comes up then shuts off and nothing !!!!

it did all the same things last night and it worked for 1 movie (took all Night) but it worked, i dragged it to iTunes and it is now on my iPhone and looks great

Why won't it do it again ??? i have tried 4 dvds HELP

[dcom]

Could be the DVD. I use Handbrake on a Mac and there are some DVDs that it can't rip. I'm not sure why it seems like its crashing but it may be a bug in Handbrake.