Playing LAN Games, but no internet?

[Dohnutt]

Lately I've been having friends over to play Call of Duty 4 LAN. Yes, we all have legal copies of the game, so that's not the problem
Yesterday was the only day we got it to work. We used his router (D-Link DI-604, Wired) and plugged in and played.

I was bored so I made up a map of my home network:


I guess I've sorta got two questions:

1) So, as you can see, we've got a router which is wireless and wired (DIR-655), and that's what "My Desktop" is usually connected to (so take the DI-604 out of the equation for now) - I usually just plug straight into the router, as I have no wireless card in this machine. My friends usually use the wireless when they come over, but then, for some reason, we can't play LAN. We're both on the same network... But our computers don't seem to detect that. I'm thinking it's probably something to do with the router settings, but I'm not sure. I can ask my Dad about that.

2) So in order to play LAN games, we use my friend's router, like I said, the DI-604. So then we all plug into that, and it works fine. However, I tried plugging an ethernet cable from our main router (DIR-655) to the WAN port on the DI-604 in hopes that we'd get internet while connecting to a LAN as well, but that didn't work. Is there some special way to do that? Would I actually have to set the router up? I mean, would I have to install all of the software and set it up like that? Or should it just automatically detect the internet through the WAN port? Am I even doing it right? Haha, I'm a bit fuzzy when it comes to networks.

I know some of you are network junkies, so help would be appreciated. Oh, and I have tried Hamachi and other programs like it, but they didn't seem to work. Maybe more router settings I have to change up? Who knows.. maybe you do?

Thanks guys..

[Delta 47]

You shouldn't need any software as far as I know. Maybe you got something in your Routers settings that's messing something up. You could reset the Routers settings to normal in case something was changed but I don't know if that would help any.

[Ipodzanyman]

I've done Lan two ways before:

*I've bridged a wireless connection with local connection to another computer, but that just shared a wireless connection. computers recognized each other

*I've just connected the two computers with a Local area network cable and disabled any firewalls- with no wireless connection there shouldn't be any threats. Both computers recognized each other

Do you have your local network drivers installed?

[Dohnutt]

Downloaded the LAN drivers, but "Driver does not support this operating system"
Darn you incompatibilities with W7!


EDIT
Sorry for the double post, but I think it's necessary 'cuz I have some new news.
So I got the LAN drivers installed (got the Windows 7 64-bit versions from ASUS) and it still seems to be the same.

I didn't really think to check this before, but whenever the wired router is plugged in, I get an orange light on my computer's ethernet port. When the internet is directly plugged into my computer from the DIR-655 router, I get a green light.