DVDR Write error, Write sector error

Please help! I am getting a couple of errors now (Write error, Write sector error) when I burn a DVDR.

I have an Athlon 1800, 120g hard drive, 256 memory.

I rip DVD to hard drive with DVDDecryptor. Version 3.1.7.0

I then get it down to a burnable size with DVDShrink Version 3.0 Beta 5.

I then use CopytoDVD (2.3.8.235) to burn to DVDR.

I never used to get these errors. I thought maybe it was the media but it does the same thing whein I burn to DVDRW.

Oh yeah, I am using a Sony DVD RW DW-U12A.

Any help would be appreciated!