Wifi Not Connecting Anymore

[Lilone21804]

Software
XBian version: Beta 2
XBMC version:12.2
Overclock settings: Default

Hardware
Power supply rating: Using the power supply from an iPhone
RPi model (model A/B 256mb/512mb): Model B 512mb
SD card size and make/type: 16 GB Sandisk /Class 10.
Network (wireless or LAN): Wireless (RIIC AR-N8508)
Connected devices (TV, USB, network storage, etc.): LG LCD, Powered USB hub, WD 1TB Passport, USB mouse and keyboard.

Logile
Link to logfile(s):http://paste.debian.net/72106/

Problem description:
When I first configured my pi, my wifi was working. Now its not able to connect to my wireless connection. I restarted the router, but still not connecting.

How to reproduce: