So.....
on my first setup attempt i used the wizard (on cd) and when it got to scan the network it couldn't find the 320l.
I checked and everything was plugged in correctly so i logged onto my router and got it's ip address. when opening the web page i was presented with a button for setup wizard so followed that. I was working through the different features and couldn't work out how to get mydlink working.
I didn't worry about it and carried on through the options and have also updated the firmware to 1.03.
According to mydlink to sort this i need the version of the setup wizard that matches the firmware but only version 1.00 has a setup wizard... is there no other way of setting mydlink up?