[PROBLEM] Raspberry Pi B+ USB and Network

[hopster]

Hello,

xbian-image-rpi-20140721 does work with the Raspberry Pi B+. USB and network are running. Though I am having problems establishing a wifi connection via TP-Link TL-WN725N. The adapter shows up as wlan0. I am also able to enter the SSID and password and it is also saying that it did a successful set up. Unfortunately it still does say DOWN and I am also not getting an IP address assigned from my DHCP server.