Rendering problem.

Hello. So Adobe doesn't let me render. I know the reason behind it, but I don't know how to fix it. One clip was basically recorded with FRAPS, and another with NVIDIA Shadowplay. When both clips are from NVIDIA Shadowplay It renders just perfectly.  I just change the Sequence and the Adjustment Layer settings to be the same and all, and it renders. Now when I tried Rendering both FRAPS  recorded clip and NVIDIA recorded clip, it got stuck at 99% when exporting.  I tried rendering them both to 60fps on Sony Vegas because I personally think it's because of the FPS, but it still didn't work. And both clip formats are MP4. Any help?