i got it to work.
I can see the wan and lan activities on it now.
For those who want to know how, you have to add the IP address of you smeserver in the DVG-1120S setup page, and under SNMP trap configuration add the IP address of your server, and enable it.
Now.. when i look at the monitor page on the DVG-1120S i found, that it is collecting a ton of data statistics. Can i get these, or is it only WAN & LAN activities?