Is there anyway for me to play in multiplayer servers?

[Oak]

I can play in single-player games currently in the standalone 2DWorlds version but on the online version I cannot. Ghosty told me how to play single-player games on the standalone version by doing "game:load(gameIDhere)" in the standalone version. I just need help on how to play on multi-player servers.
Whoever resolves my issue gets +1 thanks. Also keep in mind, whenever I try to join a MP server it just doesn't load at all.