Trial version

After starting a trial version of Premiere Pro CS6, to compare with another software. I noticed that *.mp4 files keep showing up as unrecgonizable,  after looking at this web page http://helpx.adobe.com/premiere-pro/kb/trial-version-limitations-premi ere-pro.html I am at a loss as to why I can not view and edit *.mp4 videos.  Any thoughts or suggestions?  Thanks.

via Adobe Community : Popular Discussions – Adobe Premiere Forums http://forums.adobe.com/thread/1091998