I also had the same problem and to fix it I had to open WMP, go to Tool>Plugins. Then make sure one called "True Launch Bar Remote Control" is checked and then try again.
[help] Now Playing - by Rcr484 on 04-12-2007 at 11:12 AM RE: [help] Now Playing - by pollolibredegrasa on 04-12-2007 at 11:19 AM RE: [help] Now Playing - by Rcr484 on 04-12-2007 at 11:20 AM