New Error messages

[DPG Terik]

Hey guys, I have been burning DVDs for 2-3 weeks with absolutely no problem. I am running a Plextor 12X Burner and using Ritek 8X media. I all of a sudden am getting the error message

Scheduler 0 D:/video_TS/VTS_01_0.VOB.23 readerror TCS Sector Reader TCE

I am trying to copy to ISO image. The DVD I am trying to back up it A Beautiful Mind.

I am also having troubel with The Hunt for Red October.
I am using AnyDvd and CloneDvd2.
By the way, it all started when yesterday when I tried to open CloneDvd2 and it would not open so I had to reinstall it. Not sure why and if that had anything to do with the error I am having.
One thing I have noticed is that the 2 DVDs I have mentioned do have a few scratches on them
Thanks in advance for any help!
Terik