I don't think I'm explaining this very well. The safenet software is working fine, it is not a problem.
The problem is that it will not allow any traffic to pass through the tunnel when it is connected on another lan. When connected via a dun connection it is fine (slow but fine). I aggre that the software is a bit weird but once I actually put the same

shared secret in at each end it worked fine.
It doesn't matter what the lan IP address range is - I've tried it on several lans each with a different range - it still connects the tunnel but won't let anything through