System: RaspberryPi, Kali Linux 1.0.4 (fresh install, no VM)

my wireless usb-card isn't recognized since kali 1.0.4. It's still working on kali 1.0 and some other distributions. According to the wireless troubleshooting guide, i have some further informations for you:

root@kali:~# lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter
root@kali:~# dmesg | tail
smsc95xx 1-1.1:1.0: eth0: register 'smsc95xx' at usb-bcm2708_usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:a3:be:2e
usb 1-1.3: new high-speed USB device number 4 using dwc_otg
usb 1-1.3: New USB device found, idVendor=148f, idProduct=3070
usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1.3: Product: 802.11 n WLAN
usb 1-1.3: Manufacturer: Ralink
usb 1-1.3: SerialNumber: 1.0
udevd[149]: starting version 175
EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
smsc95xx 1-1.1:1.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
The USB device seems to be recognized, but there is no wlan interface (ifconfig/iwconfig) and no drivers are loaded (airdriver-ng). It's also the only USB device running.

Any ideas ?

thanks in advance