DVD on Mac OS X stopped working

Mac OS X weird Logs:

7/21/10 8:27:37 PM kernel SCSITaskUserClient - Invalid arguments: scatterGatherEntries = 1, requestedTransferCount = 0, transfer direction is 0
7/21/10 8:27:38 PM kernel SCSITaskUserClient - Invalid arguments: scatterGatherEntries = 1, requestedTransferCount = 0, transfer direction is 0
7/21/10 8:27:39 PM kernel SCSITaskUserClient - Invalid arguments: scatterGatherEntries = 1, requestedTransferCount = 0, transfer direction is 0
7/21/10 8:27:40 PM kernel SCSITaskUserClient - Invalid arguments: scatterGatherEntries = 1, requestedTransferCount = 0, transfer direction is 0
7/21/10 8:27:41 PM kernel SCSITaskUserClient - Invalid arguments: scatterGatherEntries = 1, requestedTransferCount = 0, transfer direction is 0

I tried to burn with toaster but no dice. I'm uninstalling the toaster and re-trying it.

**UPDATE**

After uninstalling Toaster 10 on my Mac. My CDROM work flawlessly. it seems that this issue started after I applied a patch on my Mac. considering the weight of burning using toaster and having bugs fixed on Mac OS X, I would choose an OS patch than a 3rd party burner. I can always burn through (AppleKey + Shift + U) Disk Utilities.