I'm trying to share my ITunes library from a Windows 7 PC. It is up to date and home sharing is enabled. My IPad will find my library but after trying to connect just keeps showing "Cannot connect to Media Library" The same thing happens to my IPhone. After trying once the library then disappears until I switch off home sharing on my PC and turn it back on again. I've re-booted the IPad but it still doesn't work. Any ideas?