|What can't you connect to? The router? or internet|
Have you connected by wire to the router to configure it? I was not aware those Mobile USB dongles could be used connected directly to a router.
A router usually has an RJ45 WAN port and if there is a USB port present it is often for attachment of a printer. What is the exact model number of the Draytek device and how have you connected the 3G dongle to it?
Goin' Fishin' (Some day)