I have the next problem:

Servers and in solo LAN games.
What should I do?

Please have a look at #10

I've been trying but I can't solve it, I'm trying it in my Single player world with LAN enabled and hamachi connection, my friend join using an IP like --> 127.0.0.1:5892

MODS

The voice chat only works with dedicated servers. You have to start the server separately to the client.

Okey, thx!

No problem!
Let me know if you face any issues with your server.