You may wish to find and remove 3rd party IDE drivers on your system. Those are the same brand as the motherboard chipset manufacturer. Ali, Via, Sis, Nividia, Intel and more make this software (find out who's chips you got). If removing the IDE driver software doesn't help, try updated chipset support software from the chipset maker's website.
Is the drive on an 80 wire cable (recommended) or an obsolete 40 wire cable?
If there was a previous optical drive, previously master of the second IDE channel, you may need to reset your CMOS if the previous optical drive did not use UDMA33.
After resetting CMOS, boot directly into the bios (be tapping the del key) and choose "Optomized Defaults" as the first step.
While in the bios, set any IDE channels in use to Auto Detect with Auto Type and any that are not in use to "none".
Turn off any onboard features that you have duplicated with upgrade cards. For instance, if you have a Soundblaster, then turn off the onboard sound chip.
If you do not use Com/serial ports or Lpt1/printer ports, then you can turn those off as well for a better-running computer.
My own computer had to have a CMOS clear in-between a Sony DVD writer and the BenQ DVD writer before it would match-up with the BenQ (similar to your Philips).
Dma is on. Well, good. But, is that Multi-Word DMA 2 which indicates that UDMA is shut off at system board level? Or, is that UDMA 2 which indicates that it should be working?
Also perform a test by saving your Nero output into an ISO file. Use DVDdecryptor or RecordNow to burn the ISO file onto the disc. You can also use DVDShrink to create ISO files. Anyway, burning software sometimes differs in performance. DVDDecryptor and DVDShrink are free downloads, so you can easily use them to test your drive without Nero as a variable.