Networking problems

[luckyducky]

So I've recently installed Kubuntu 10.04, and after the first and second runs, the system refuses to connect to the network/internet.
I'm not sure why this is, or how to fix it. It shows up in ifconfig, but other than that I'm at a loss.

The Knetworkmanager applet says "Disabled" when I hover over it, and no connection can be made to the internet (apt, Firefox).

I'm running x86, with a Biostar T5XE mainboard (Realtek RTL8168D/8111D network chipset). The logs don't seem to indicate a problem, though I could be wrong.
The connection is known good: it connected before, but it won't now.

Any ideas?

[nujinini]

Hi and welcome luckyducky,

May I suggest you post outputs of those that are requested here please?

Wireless Setup - Start Here

Good luck!