WMP Video Only Shows Visualization in VB.NET

I have created a basic form with Windows Media Player embedded into it. I followed the instructions in this article: http://ift.tt/1zW7zNH

The issue I have is that it only shows the visualization for videos, as if it were an audio file. So it plays the audio just fine, but it doesn't show the visual of the video. I have tried MP4, AVI, MOV, and WMV, so I know it's not an issue with the video format I'm using. Everything else works fine too: changing the UIMode, stopping/playing, etc.

The weird thing, too, is that the exact same code will run just fine on other PC's, but not mine. I tried reinstalling WMP, to no avail. I'm thinking it's an issue in my WMP configuration and not in the code then? Not sure. Any help would be greatly appreciated!