[PROBLEM] Raspberry Pi B+ Lan

[Joerg]

Software
XBian version: 1.0RC2
XBMC version: 13.1-BETA1 Git:2014511-692cfba ( Compiled May 10 2014 )
Overclock settings: NON ( 840MHz )

Hardware
Power supply rating: 5V 2000mA
RPi model (model A/B 256mb/512mb): B+ 512MB ( BCM2708 )
SD card size and make/type: 8 GB SanDisk Extreme Pro
Network (wireless or LAN): LAN ( Not Working )
Connected devices (TV, USB, network storage, etc.): will be an USB Drive 1 TB

Logile
Link to logfile(s): not aviable

Problem description:

After installing ( Windows Installer ) and Booting ther is NO Lan aviable in the Onscreen Setup
BUT when i plug the Kable into my TV or Laptop i get an Link and its working.

And when i install an Linux at the Card i will have an working Link.

Will try this Image http://ivka57.dyndns-ip.com/images/

xbian-image-imx6-20140720.img.xz

Thanks for your time to help an Newbie.

How to reproduce:
Dont know