It may be codecs or patches, but iMEsh is designed to work with WMP with no problems
Now take a breath! It'll be OK!
iMesh only works with Windows 2000 & XP, and WMP 9 or higher. Check what your WMP version is by clicking help, then "About"
If you need to dl the totally new WMP11, go to http://www.microsoft.com/windows/windowsmedia/player/download/download.aspx and get it. It's only been 7 weeks, and I've been using it since day1, and love it. You can get WMP 10 at the same link.
Go to Tools > Options > click the tab for File Types and make sure EVERYTHING is checked off.
If it's licencse acquistion error, I hit the iMesh website, and if you have the premium version of iMesh, they recommend downloaading the latest WMP, then restarting your computer when it's done. Then, go to iMesh and download their latest version. When it's done and you sign in, DO NOTHING for 5 minutes. Once signed in, do nothing (we mean it, this is very important), and wait for 5 minutes without touching your computer whatsoever. This is important, as iMesh needs to reacquire licenses for your songs.
When the 5 minutes elapse, proceed to play some of your tracks; there may be a slight pause upon attempting to play the first track, and then everything will return to normal functionality.
If you still ahve problems, you can contact their support at http://wa.imesh.com/support/bugreport/ before you start hosing your PC with codecs and stuff
If you get it working again, just click help in WMP... it explains everything you need in almost plain English.
Good luck!