Plutonium

Xerxes We all have it activated so that shouldn't be a problem.

I have read the thread explaining how to play with friends but one step isn't working.
To join a friends game you double-click their name in the Friens List, but when me and my friends try that nothing happens.

I have made sure to check things such as UnPn is enabled but I don't know what the problem is.

Thank you for any help.