Bit more info; to set the VLAN ID:
Click the "Internet" menu on the left, which expands, then click "Account Information".
On the right, scroll down and click "Change Connection Settings" to expand this section.
Tick "Use VLAN for internet access", and enter 101 as the VLAN.
Click apply, whilst keeping your fingers and toes crossed.
If it works, mine's a pint