A click from the solenoid means at least it is trying to work, so I think that is OK. When I had solenoid problems on my WOA2 last year, it didn't make any noise at all. Check the leads to the chassis, starter and solenoid, BUT DISCONNECT THE BATTERY FIRST. Also, as suggested, try another battery - my WOT2 is running on a 12v battery at the moment.
Are you sure the starter is OK? It could be worth getting this checked out to at least eliminate the problem. I did get problems with a starter once, and the problem you describe sounds similar.
There should be a connection from the chassis to the engine. It this OK?
Another thing to check - have you got the Negative battery terminal connected to the chassis?