What version of PRE are you using and computer OS
Besides Premiere Elements version and computer operating system....what video card/graphics card does your computer use? If 14, look at the burn to with and without the Use Hardware Acceleration (works on Intel HD 2000 and newer) disabled in Edit Menu/Preferences/General.
What are you doing - burn to DVD-VIDEO standard or widescreen on DVD disc or AVCHD on DVD disc?
Just before you hit the Burn button, what are the readings for Space Required and Bitrate (with check mark next to "Fit Content to Available Space"?
What DVD disc are you using 4.7 GB/120 minutes or 8.5 GB/240 minutes?
How far do you get into the burn to DVD disc when the program freezes...
But perhaps I am getting ahead of myself. Do you actually hit the Burn button and initiate the burning and have problems. Or, are all that you are doing is hitting
Publish+Share/Disc (for version earlier than 14) or Export & Share/Disc (for 14) and everything freezes before you can go further?
Routine question - do you have the latest version of QuickTime installed on your computer with Premiere Elements, and are you running the programs as administrator (from user account with administrative privileges)?
Please consider, supply details, and then we can decide on a troubleshooting strategy based on the details in your reply.