It helps, oddly enough, most people with horrid lag. I'm honestly stumped for why just a single extra connection on top of all of the others would cause you to crash out.
It has a max of three and assigned two. But, you are running your OS, a server, and a client. If one starves, they all suffer. How much RAM do you have total?
Perhaps you should get someone a little bit more knowledgeable with computers to help you out and post the rest of your system details because that is not nearly enough info for us to go on.
He just gave you a suggestion that may save the server. So, rather than acting like an ungrateful child, maybe you should "try" it before you come back demanding help.