Problem with TSST Corp CD/DVDW TS-L532M

I have a Compaq nx6310 with the above drive and have Convert xtodvd (3.3.4.106) + Nero7 Ultra Edition installed. Sonic was pre-installed and not used. I typically use Convert xtodvd for DVD burning and Nero for mp3/cd burning.
Past few days I am unable to burn any dvds on DVD-R using either Nero or Convert xtodvd though in both cases it shows that the action is happening and the burn is successful (extract from log given below). But there is no problem on DVD+RW. Have tried different DVD-R media but no help and have a dozen blanks that have been wasted. The drive is also being shown as CD Drive (E:).

I noticed this started to happen after I clicked on the Sonic MyDVD PLus but did not use the program.

Have seen various threads re this drive on the forum (amending registry for missing drive etc) but not the exact same problem

Any help would be welcome

2009-05-12 12:26:45 Info BURN: WRITE SUCCESS: Disc written
2009-05-12 12:26:45 Info BURN: Finalization Time 00:01:28 - Total completion time 00:29:09
2009-05-12 12:25:16 Info BURN: Write finished in 00:27:40 - Finalization start here. Avg. burn rate 2.14
2009-05-12 11:57:45 Info BURN: Lead-in burning time (mS) 8526
2009-05-12 11:57:36 Info BURN: Write started 2186368 sectors to write
2009-05-12 11:57:36 Info BURN: Init success: DVD-R SAO
2009-05-12 11:57:36 Info BURN: Writing speed requested x2.0, effective x1.0
2009-05-12 11:57:36 Info BURN: Available write speed: 8x, 4x, 2x,
2009-05-12 11:57:36 Info BURN: Media ID: MBI 01RG40
2009-05-12 11:57:36 Info BURN: Media type: DVD-R
2009-05-12 11:57:36 Info BURN: Multiword DMA Mode 2
2009-05-12 11:57:33 Info BURN: Scanned files #31, folder #2 - total size 4476536832 b. (4.17 Gb.)
2009-05-12 11:57:33 Info BURN: Inserted media type : DVD-R
2009-05-12 11:57:33 Info BURN: Write started
2009-05-12 11:57:32 Info Disc name: “01 - The Primes”
2009-05-12 11:57:32 Info Burned folder: “C:\Documents and Settings\Administrator\My Documents\ConvertXtoDVD\01 - The Primes”
2009-05-12 11:57:24 Info BURN: New media (DVD-R) inserted. Burning layer is ready to write
2009-05-12 11:57:22 Info BURN: Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
2009-05-12 11:57:22 Info BURN: Drive has IDE-ATAPI physical interface
2009-05-12 11:57:22 Info BURN: New Drive selected : 0:0:0 - TSSTcorp CD/DVDW TS-L532M HR08 [E] (Ide)
2009-05-12 11:56:51 Info 34 Menu templates loaded.
2009-05-12 11:56:49 Info BURN: New media (DVD-R) inserted. Burning layer is ready to write
2009-05-12 11:56:47 Info BURN: 1 writer(s) found.
2009-05-12 11:56:47 Info BURN: Loaded DLL “C:\Program Files\VSO\ConvertX\3\vso_hwe.dll” [3.2.4.406]
2009-05-12 11:56:47 Info BURN: Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
2009-05-12 11:56:47 Info BURN: Drive has IDE-ATAPI physical interface
2009-05-12 11:56:47 Info BURN: New Drive selected : 0:0:0 - TSSTcorp CD/DVDW TS-L532M HR08 [E] (Ide)
2009-05-12 11:56:47 Info BURN: Using Patin-Couffin driver Version 1.37, Internal revision 37 Async. Access mode
2009-05-12 11:56:46 Info Supported instruction set: sse3
2009-05-12 11:56:46 Info Tuning Performances for Genuine Intel® CPU T2300 @ 1.66GHz with 2 core(s) CPU
2009-05-12 11:56:45 Info System default language : English (United States)
2009-05-12 11:56:45 Info User default language : English (United States)
2009-05-12 11:56:45 Info Version : 3.3.4.106
2009-05-12 11:56:45 Info ExeName : C:\Program Files\VSO\ConvertX\3\ConvertXtoDvd.exe
2009-05-12 11:56:45 Info OS : Microsoft Windows XP Professional (build 2600) with Service Pack 3 5.1
2009-05-12 11:56:41 ---- ******************** Log session start 2009-05-12 11:56:41.015 PID 248********************