I read your post twice and found little to work with. Tell more.
I recently moved and have had a miserable time setting up my dsl connection and wireless network. I had it working for a short while but now every computer on the network is bogged down with a 'sending request' message in their browsers every I try to load a page.
Eventually the page does load(no timeouts) but it's extremely sluggish and frustrating. I called my ISP who said there is no problem on their end.
Could this be a modem problem? Is there a way I could configure it to be more efficient? I doubt that it's the router now, since the wireless signal is good, the firewall is off, and accessing the router page is instant (where as the modem page takes forever).