D-Link DWM-156 Aircard Dial up failed error

Hi all,

I am using a D-Link DWM-156 Aircard on a Window 7 notebook.

Installation was smooth.

The D-Link Connection Manager displays that TrueMove H is recognized and 3G as speed.

But everytime I click on "Connect" I immediately get the error message "Dial up failed".

Have a look at the attached image.

I can send USSD Codes and receive SMS via the Connection Manager.

One SMS states that I have a promotion for 90 MB.

I have successfully used the SIM card in a mobile phone and could connect to the internet.

I have imported the TrueMove H APN settings and tried again.

Nothing is working.

Since the error message comes up so quickly I am tending to some hardware/software problem on the computer.

The device manager does not show any conflicts though.

Any ideas welcome