How much traffic are we talking about?

Well I would suggest you read over your manual. I have never personally configured the router you mentioned so I couldn't tell you what settings may need adjusting. Have you tried DLink's support...

I would guess that your router is configured incorrectly, I can't say for sure though, or what could be wrong. Anyone else out there have a good suggestion for him?

Diluted Thoughts, check your manual for your router, if you don't have a manual go to the manufacturers website and see if they have a downloadable one.

woody, ok that is a little tough, I would...

Diluted Thought, check out this thread http://www.daniweb.com/techtalkforums/showthread.php?t=1547 I think this will solve your problems. If you are able to get to hotmail.com and yahoo.com but not...

Do you have a firewall program running?

I would say that either your firewall or your router are blocking certain requests, or the MTU settings are not correct.

Are you able to get to...

Ya that was my first thought on this, but he said he switched the cables.

Ok, if your dad's never disconnects and yours does then the problem is definately not your ISP or the router, at least you can eliminate that, and if you have switched the cabling you can eliminate...