PS3 Media Server

I have reached the point of almost giving up, I just cannot fathom why when using both eyeconnect and medialink, the ps3 is not recognised in the devices list. I have also tried streaming from my home pc via tversity which is also unable to find the ps3. Therefore i believe the problem must be with either the wireless router and subsequent ports or the ps3 itself. Do i need to either open ports (and if so which and how, I am running a netgear dg834g router.) or do i need to alter some settings on the ps3. When i test connect the UPnP states Not available, is this normal?

Thanks