PS3 and Sky Hub

I use my PS3 as a media server to stream pictures, music and vidios from WMP on my computer to the TV. This has never been a problem until I upgraded my router to the new Sky hub. All I get now is " no media server found". If I put the old Sky Sagem router back then it all works perfectly, therefore somehow the Sky hub is blocking this.

Any ideas how to remedy this?

long shot.............

Try connecting into the new SKY hub on each of the different Ethernet ports.

I don't have a PS3 but do the same using NAS, when I changed my router over I had to go into the NAS software and deactivate the Media Server then reactivate it so that it opened the correct ports on the router, so that could be a starting point for you.