A site in my multi-site not accessible after changing hosts

Hello... i have a multisite http://www.masaajid.co.uk

My sub site is http://www.masaajid.co.uk/almedinah and it also has a mapped domain almedinah.co.uk

However after changing hosts... my sub-sites are not inaccessible. (404 message when i access them from http://www.masaajid.co.uk/almedinah)

Help?