Sony DRX700UL incompatibility with DVD+/- RW 2.4x media?

[HDFAN]

I recently replaced my Sony DRX500UL DVD burner (it died after only a year ) with the DRX700UL model and now I find that it can't backup my DVD movies to Memorex 2.4x DVD +RW media anymore. The drive will work fine with any 4x media I've tried but any 2.4x media I try to burn won't play on my home players like it did with the DRX500UL. Anyone know of a way to configure DVD Decrypter or Nero (6.0) to accomplish this? I'm am using the latest firmware (VY06). FYI, both DVD Decrypter and Nero both report successful burns most of the time, but DVD Decryptor will sometimes fail when doing a verify of the burn. Any help appreciated!

[code65536]

What's the media code of the Memorex 2.4x media?

[HDFAN]

Here's what I get from DVD Decryptor:
SONY DVD RW DRU-700A VY06 (1394)
Current Profile: DVD+RW

Disc Information:
Status: Empty
Erasable: Yes
Formatted: No
Free Sectors: 2,295,104
Free Space: 4,700,372,992 bytes
Free Time: 510:03:29 (MM:SS:FF)
Supported Write Speeds: 2.4x

Physical Format Information (ADIP):
Disc ID: INFODISC-A01-02
Book Type: DVD+RW
Part Version: 2
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,491,711
Last Physical Sector in Layer 0: 0

Physical Format Information (Last Recorded):
Disc ID: INFODISC-A01-02
Book Type: DVD+RW
Part Version: 2
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,491,711
Last Physical Sector in Layer 0: 0

Format Capacity:
Sectors: 2,295,104
Size: 4,700,372,992 bytes
Time: 510:03:29 (MM:SS:FF)