From your screenshot, it looks like you do not have the permissions set properly to access the USB device.
Either try to run the adb service as root:
$ sudo adb kill-server; sudo adb start-server
OR, the more permanent solution is to set up udev rules for USB device permissions. See the instructions in step 3 of the android Developing on a Device page.
Log in as root and create this file: /etc/udev/rules.d/51-android.rules. The udev system checks this file for special cases when devices are detected.
Edit the file to read:
SUBSYSTEM=="usb", SYSFS{idVendor}=="0bb4", MODE="0666"
This sets permission bits on the dev node to world read and writeable for the special case where the USB vendor ID is equal to 0bb4.
Now execute:
chmod a+r /etc/udev/rules.d/51-android.rules
... gives world read permission to these android rules which is needed to let the udev daemon process this new rule.