Space Engineers Private "Server" help

[OP Skiver 1,420]

I recently bought Space Engineers However I am having issues trying to setup a "private server" for me and a friend, basically I have a machine setup, one I used to run a Minecraft server on ok via Hamachi and we both connected as if it were a lan game so I saw no reason why it wouldn't work here. Now for some reason I can connect fine but my friend does not see it in his "LAN" list as expected and when I try to invite him he gets an error "server did not respond" or something very similar.

 

Now the server is not on my local network so without Hamachi I cannot connect to it (Whether I turn off Hamachi at my end or server end the result is the same). So I'm pretty postive the Hamachi side of things is working.

 

When I setup a local game and then invited him to my session it worked and if he goes to the server browser he can see other online games so I don't see this being a port issue on his side.

 

Does anyone have any idea's what this could be?