First try to update your PSE by going to:
Help >> Updates;
Now this may or may not fix the problem because there may not be any new updates. Now second best thing is to use Adobe DNG converter. The latest version is 8.1 and the relevant links are here:
You also need to view this video to learn how to use the DNG converter:
The third option is to use the software that must have come with your camera. I can't help you with this because I know very little about your camera.