Has anyone got a Draytek 2820 working with a Vodafone K4505?

I can see that the K4505 is on the compatibility list but I cannot for the life of me get it to dial the connection.

I have tested the K4505 in my laptop and it works fine with both GPRS and 3G.

It is a Vodafone 250Mb Monthly Pay-as-you-go SIM installed.

The firmware on the 2820 is 3.3.7.3 - latest version.

Syslog looks okay, it can see the modem and looks like it tries to connect it just doesn't.

If you do have it working could you kindly share your configuration settings with me please?

Many thanks