Cannot see shared libraries

I have a 1st gen iPad (ipad1) running iOS 5.1.1

Ipad1 is connected to iTunes 11.0.1.12 on my windows 32 bit laptop (laptop1) using my Apple ID (ID1)

I have just bought a new iPad retina (ipad2) running iOS 6.0.1 for my partner

Ipad2 is connected to ITunes 11.0.1.12 on my partners' windows 32 bit laptop (laptop2) using his Apple ID (ID2)

We want to share content, including apps, books, films and music so we tried to set up home sharing over our wireless Internet home network

We have authorised ID1 and ID2 on both laptop1 and laptop2

We have set up home sharing using ID2 on both laptop1 and laptop2

Both laptops have the firewalls switched off

But we still cannot see each other's libraries on iTunes on laptop1 and laptop2

We have tried rebooting, shutting down and reopening iTunes, turning home sharing off and on etc. but still cannot get it to work and it is driving us mad. Many posts suggested this was a problem with iTunes 11 so we even tried reverting to iTunes 10.3.1 and still could not see each others libraries.

Could someone please help!