What steps have you taken and what are your results?
What model of camcorder is your video coming from and what format and resolution is it?
Which version of the program are you using and on what operating system?
Are you able to burn your DVD files to a folder on your hard drive?
This is a very generalized problem with several possible causes, so please give us as much detail as possible.
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
Set your DVD output to a folder on your hard drive and then use the FREE Imgburn to write the folder to DVD (send the author a PayPal donation if you like his program)
Read http://forums.adobe.com/thread/1322583 for notes on installing Imgburn WITHOUT any toolbar add-ons