DicomBurn creates jobs at C:\PTBurnjobs folder, and look for new job files (.tdd) are being created there. Check the TDBStatus.txt file for any potential issues.
If you find a 'ERROR' code in TDBStatus.txt , search the Error code in TD Bridge Troubleshooting guide.
Do check the TD Bridge Environment settings again if the watch folder is set to C:\PTBurnJobs. Most common issues are disc type mismatch - DiscProducers won't accept a CD if the specific dive is set for DVD etc.