Netplay + 2.0 Help!!

[probpe]

I set up the server fine,
but I disconnected server and connect server again,
the user data(table Users(phpMyadmin), Data of ID, Password, etc.) has gone..

so I changed server.rb with Netplay Master Thread's post.(may it was a tutorial made by Dutch)
but it has a lot of error.

Pleas Help me and I'm sorry for my awful english, I'm Korean.