High latency and Colloquy won't connect

I'm new to Mac. Just got the 27" i5.

First, my Interent gets really slow. Tests show a latency of ~3000ms. When I restart the Mac, it gets better for a while, but goes down again. Very difficult to use the Mac this way.

Second, I can't connect to anything in Colloquy. I've tried a number of servers. No error and nothing in the console.

I would really appreciate any ideas.

 

Bumping this.

It's still a big problem. I thought it might be my Mail app which is perpetually trying to send messages and failing (another problem I'd appreciate help with). I thought it was my wireless mouse creating interference. I thought it was Steam downloading. All those things may have had an impact, but removing none fix it. Pages take ages to load. They load faster on my phone.

Help?

 

I am on WiFi-n. My router is an Asus RT-N16 (pretty powerful, can handle a lot of connections). My connection is Shaw Cable high speed Internet in Vancouver.