Px-716sa problems? please help

I seem to be having an issue with my drive, on day i woke up and it decided it wasn’t going to work, it burns cd’s with no errors or anything, completes the process 100% in : Nero, iTunes, or even plextools audio burner but when i take the disc out there is nothing on the disc, it’s blank, so blank that i can put it back in and try to burn on it again. if anyone knows of some solution I would appreciate it thanks.

I have a standard setup,

Computer Type: ACPI Multiprocessor PC
Operating System: Microsoft Windows XP Professional
OS Service Pack: Service Pack 2
CPU Type: Intel Pentium 4 640, 3215 MHz (16 x 201)
Motherboard: Gigabyte GA-8I915P Duo Pro (3 PCI, 2 PCI-E x1, 1 PCI-E x16, 2 DDR DIMM, 2 DDR2 DIMM, Audio, Dual Gigabit LAN, IEEE-1394)
Motherboard Chipset: Intel Grantsdale i915P
System Memory: 2048 MB (PC3200 DDR SDRAM)
Video Adapter: RADEON X800 Series (256 MB)
IDE Controller: Intel® 82801FB Ultra ATA Storage Controllers - 2652
Storage Controller: SCSI/RAID Host Controller
Disk Drive: WDC WD1600JB-00GVA0 (149 GB, IDE)
Disk Drive: WDC WD5000AAKS-00TMA0 (465 GB, IDE)
Optical Drive: PLEXTOR DVDR PX-716A (DVD+R9:6x, DVD+RW:16x/8x, DVD-RW:16x/4x, DVD-ROM:16x, CD:48x/24x/48x DVD+RW/DVD-RW)