Problems with itunes remote speaker option

[DoogieWoogie]

I usually listen to my music using Airtunes, which is fine.

However whenever i try to use the "multiple speaker" option and pick both airtunes (lounge) and computer I get the following error message.

Any help would be appreciated.

 

[DoogieWoogie]

Updating to iTunes 7.3.2 doesn't fix the above bug.