It's impossible to say without knowing more about your system.
What operating system are you using? How fast is your processor, how much RAM do you have and how much free, defragmented space is on your C drive? Are your project files on another drive? If so, is it formatted NTFS or FAT32?
What kind of camcorder did your video come from and how did you get it into your computer? When you set up your Premiere Elements project, which settings did you select?
Have you ensured you have the latest version of Quicktime?
Welcome to the forum.
Along with the specific questions posed by Steve, this ARTICLE might offer some tips on the info that would be very useful in helping us diagnose your problem.
Thanks Steve for your suggestions - I am a bit of a beginner with this stuff....
In answer to your questions...
I have Intel(R) Core (TM)2 Due CPU E8400 @ 3.00GHz 2.67 GHz
4.00G (3.25 usable) installed memory (RAM)
32-bit operating system
with a c drive, f drive and g drive for storing programs and files etc
The Adboe program runs from my F drive 17GB used 568 free (NTFS) according to disk fragmenter analysis - it is 0% fragmented
the project Files are saved in my G drive 93 GB used 835GB free (NTFS) according to disk fragmenter analysis it is 0% fragmented
The video I am created is actually just using still digital photos - from a sony still camera.
I have not changed the settings for the project...it used to work, when using the same settings. I'll check what version of quick time i have - but how does that impact saving a project as a mpeg or windows media file?
Thanks for your help...
this article looks helpful...to add to my comments to Steve. the actual clip is pretty short, Just 2.5 minutes of still shots and some audio narration added in and a few titles.