Have you installed any new DVD writing software?
Things and Software to AVOID when authoring/burning a disc... says Encore, but also applies to Premiere Elements and disc burning
Start --> http://forums.adobe.com/thread/608660
#2 has WHY Explained http://forums.adobe.com/thread/607390
Important. What version of Premiere Elements are you using and on what computer operating system is it running?
Recently two types of approaches to resolving the Premiere Elements burner location field "no burner detected" have been successful
Assuming Windows 7, 8, or 8.1 64 bit
1. Uninstall the usual Control Panel way, do a free ccleaner run through (regular cleaner and registry cleaner parts), reinstall with antivirus and firewalls disabled.
2. If you have Premiere Elements 13/13.1, also consider disabling the preference name "Use Hardware Acceleration (works with Intel HD Graphics 2000 and higher)". See Edit Menu/Preferences/General.
Please review, consider, and supply more details to help us help you.