Well first i can tell you have to change router (no name?), but don't take a D-Link one, the work perfectly only in Ethernet mode.

So yes, you have to change router.

Ain't i the lucky one............ a have a god damn d-link router........... oh well, guess i'll have to get another one, it's killing me getting disconnected 30 seconds in to every RE: Revelations raid mode session.

It was definitely a router issue. Again, thanks to everyone. My 360 works flawlessly. Never had another disconnect in any game fro the 3DS ever again. Used to turn off everything--PS3, Wii, 360's, Cell Phones, basically anything that could connect to the internet when I play 3DS online and I'd still get disconnected. Yesterday, I had Netflix running on the PS3 and two PC's running and I didn't have a problem. I'm currently downloading every PSP game I've ever purchased (gonna put them on my Vita in a couple of days) and played online. Still didn't have a disconnect.

Couldn't be happier!

Glad to hear it worked! Have you secured your network?

Secured the network.  In the past, somebody named Preacher would always steal my Wi-Fi.  I bet they're pissed right about now. 

Track him down and give Preacher a sermon about where people who steal wi-fi go when it's all over!

[spoiler]It's the computer store, online retailers being now unavailable to our internet thief[/spoiler]

Just tried to play Left 4 Dead with Erikers..............

my ping was as red as a baboons bottom............ its seriously time to ditch both aol and d-link (loyalty only goes so far when it comes to ISP's)

got disconnected from Erikers game 4 times in the space of 5 minutes, enough is enough.