I’m having an issue on WHS2011 where I can only play one source. I set the overridespeakers to true, restarted the service but still having the issue.  I’m getting “Unable to load CasaTunes Controller Audio Driver Error” on the diagnostic.  Any ideas?

Marko, it appears you are using a CasaTunes Xli or XLe controller but the system was unable to find the driver.  Are you using a CasaTunes Xli or XLe controller?  If so, you should verify whether you have loaded the CasaTunes XL Audio Driver.  If not, the CasaTunes XL driver can be downloaded from our web site here: http://www.casatunes.com/multi-room-audio/index.php/customer-service/downloads/