That display only advertises 2 modes:
1280x800x24@60
2560x1600x24@60
2560x1600 will only be supported with a DisplayPort connection. Through HDMI/DVI 2560x1600 will not be available, so the only other resolution supported is 1280x800.
You will need a USB to DisplayPort adapter to get the maximum resolution from this display. There are some listed in the DisplayLink shop:
http://displaylink.com/shop/adapters
Wim