But I'm an old hand with networks and more. Your post didn't give where you were having an issue. I read you bought a new router so the common gaffes I run into are:
1. The SSID is hidden. Sorry folk, no added security and can make some devices impossible to setup.
2. Firewalls. I can't tell if this applies here. Not enough story to tell you to test with the router firewall off.
3. Driver install. For Canon I really like how they let me get the full driver from their site. Run it and I'm done.
I purchased a Canon Pixma MX490 printer. I have tried for days to set this up. I can't do it. I don'twant to call the useless support folks at Canon.
Is there another multifunction printer that has an easy setup? Which do you recommend?
I do not want another Canon!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic