I think I solved the mystery of MC switching to audio on it's own. I never did get all of the remote commands working with my MX-850 URC remote when I switched to version 25. Today I decided to get them all working in version 26. I went into the remote commands table and entered the missing commands. I then started testing them and every time I hit the enter button it switched to the audio files. I tried my HP MCE remote and everything worked properly. I then taught the HP commands to the MX-850 remote and then relearned the commands to the commands table, now they all work properly. Somehow the audio command was corrupted and when I deleted it and relearned it all is well. I really am not sure what was wrong but it all now works. Big thing is the wife is happy with it. She can now go directly to the Guide, Recorded TV shows, the Video Library, or the Audio Files with just a button press. Thanks all for the suggestions.