Youtube/Maps/Instaler connection problem

[flauca]

Hy. I bought a 1.1.4 iPhone a week ago. I seem to have problem connecting to my WiFi when i want to watch Youtube, check the maps, or weather. Sometimes the installer works sometime it dosent install anything even if it is from a source that was working 10 min earlier. The phone works perfect on any other networks, i have tested all its features. On my network the only thing that works is Safari and it works perfect.

Any ideea what the problem might be?

I have a belkin n1 wireless router and the internet provider is bell sympatico if this helps.

Tks.