Optical Drive will not Burn

For some reason, the superdrive in my Macbook Pro will not burn any media. I either get a "medium disc write error" or, when using Toast 10, I get the below problem report.

Is my drive bad? Is Toast not working properly?

Process: Toast Titanium [246]
Path: /Applications/Toast 10 Titanium/Toast Titanium.app/Contents/MacOS/Toast Titanium
Identifier: com.roxio.Toast
Version: 10.0 (530) (10.0)
Code Type: X86 (Native)
Parent Process: launchd [176]

Date/Time: 2009-12-05 17:15:04.735 -0600
OS Version: Mac OS X 10.6.2 (10C540)
Report Version: 6

Interval Since Last Report: 420149 sec
Crashes Since Last Report: 11
Per-App Interval Since Last Report: 93169 sec
Per-App Crashes Since Last Report: 8
Anonymous UUID: D1FF2A32-4167-4753-92E3-9F2353A65591

Exception Type: EXC BADACCESS (SIGBUS)
Exception Codes: KERN PROTECTIONFAILURE at 0x000000000000001c
Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Here are the specs for my Superdrive:

MATSHITA DVD-R UJ-857:

Firmware Revision: HAEA
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW, +R, +RW
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media:
Type: DVD-R
ID: CMC MAG. AM3
Blank: Yes
Erasable: No
Overwritable: Yes
Appendable: Yes
Write Speeds: 1x, 2x, 4x

Message was edited by: WingTipMikey