USB Connection Error (Nxt & TestApplication)

Hi,

Im new with monobrick and Im trying out the test application.

Unfortunately i cant seem to connect to the brick with USB.

I have followed the connection guide found here:

http://www.monobrick.dk/guides/communication-library-guides/communicating-with-mindstorms-under-linux/

 lsusb|grep Lego
Bus 001 Device 010: ID 0694:0002 Lego Group Mindstorms NXT 

I get the following error when running the test application:

 
  at MonoBrick.LibUsb

2[TBrickCommand,TBrickReply].Open () [0x0005b] in /home/gustavg/code/mono/TestApplication/usb.cs:363
at MonoBrick.USB`2[TBrickCommand,TBrickReply].Open () [0x00000] in /home/gustavg/code/mono/TestApplication/usb.cs:84
at Program.Main (System.String[] args) [0x0000b] in /home/gustavg/code/mono/TestApplication/Program.cs:9
`

I appreciate your help