Welcome to Vodafone Community
Haven't a clue, never even heard of that modem. Perhaps that has something to do with it. I assumed you were using the Vodafone supplied hub.
Have you tried wired instead of wireless? Without knowing your sync speed it is impossible to suggest much as that would be the starting point. What do you get with the Vodafone hub?
I can put the vodafone hub back on. However the dm200 reports a sync speed of 27meg. No mention of upload sync speed. Where is the upload sync speed on the hub?
The DSL status page also gives lot of useful information:
DSL Status This status page shows technical parameters of your data connection. DSL Status Information
Line Quality Downstream Upstream