Error -15000 when trying to play to Airport Express speakers
I've got a brand spanking new Dell laptop that came with Windows 8 installed, although I quickly updated to Windows 8.1 During that time, iTunes has never been able to connect to my Airport Express speakers. I used them just fine with my old computer under Windows Vista and Windows 7.
Until yesterday, whenever I tried to connect to a speaker, the program would pause for about 30 seconds, then give me the dreaded -15000 error.
Later yesterday I reconfigured my firewall (McAfee LiveSafe Internet Security) to not only allow iTunes to do whatever it wants with the network, but also to specifically open TCP and UDP ports associated with iTunes in the hopes of getting it working.
Now it doesn't give me the -15000 error, but it fails silently (without a popup). It doesn't connect to the speaker, but just leaves me with the computer speaker selected.
Any idea what's going wrong?
Windows 8