DVD to MPG stops at 385meg

[villan]

I have been trying to rip the mummy DVD for starters. What im finding is i can rip the hold DVD and when i go co convert it it only gets to about 385meg and will stop our crash. I have tryed to use Dup-dvd, SmartRipper 2.41, DVDx_1_8a, DVD.Copy.Plus.v3.8.
DVD Squeeze. they all get to the same part. I have about 8gig free b4 i start to rip.
I have a samsung DVD-ROM SD-616F a Lite-on CDRW 40125s with a 1.6 P4, 512MB ram.
As i did say i have tryed all the programs to try and get pick converted