This particular forum (sharing and storage) was created to help those transitioning from Photoshop.com to Adobe Revel. I am moving your post to the premiere elements forum so that it can get proper attention.
We also have many other forums relating to other Adobe products at: http://forums.adobe.com.
Out of curiosity, can you tell me how you found our forum page?
First, note that this is a user-to-user forum. If you want to contact Adobe, you'll need to call or write them on their main site.
That said, as the note says at the top of the forum, you're going to have to provide us a lot more information if you want us to help you. "Stopped working" doesn't tell us much. Does this mean that it was working in the past but then stopped? What stopped? What did it do that it's not doing now? What were you doing when it stopped? Was it when you were adding video to your project, for instance?
What operating system are you using? If Windows, have you manually gone to Windows Update and made sure you've got the non-critical updates, which don't download automatically to your system? Have you ensured you have the latest version of Quicktime, per the program's requirements?
How fast is your processor, how much RAM do you have and how much free, clean, defragmented space is on your hard drive?
What model of camcorder is your video coming from and what format and resolution is it? Did you use Premiere Elements to get the video from your camcorder to your Premiere Elements project?
This article will give you some tips on the type of information that would be useful in troubleshooting your problem: http://forums.adobe.com/thread/459220?tstart=0
The more information, the better we can help you.