It's an issue with TCPMP and WM 6.1... I can't think of the fix off hand, but I will try to look for it for you... Until then, maybe you should try Kinoma FreePlay... It offers YouTube streaming straight from the program... I have Kinoma installed... It is simply the best video/audio player I have ever used. It lets you log into YouTube and view your favorite videos and playlists without having to open a web browser..
I like using the Kinoma Free Player. It lets you search and watch YouTube video's straight from the program. It will also let you play all the audio/video files you have on your phone. I think this is the best free program for audio/video in general for the Mogul. Also, if you use Kinoma, you will not have to download a separate program to watch YouTube videos.
This is the link to the direct download.. THIS LINK WILL START THE DOWNLOAD PROCESS so be warned.
http://kinoma.com/freeplay/download/
And this is the the site that gives you details about the program
http://kinoma.com/play/
I uploaded the latest version of TCPMP that works with WM 6.1...