[=WoR=G4M3Ov3r]

PHP код:

OnPlayerConnect(playerid)
{
    ShowPlayerDialog(playerid, 1, DIALOG_STYLE_MSGBOX, "Rules", "You must abide the following rules: [Type your rules, and use /n to indent a line", "Done", "Quit");
    return 1;
} 


What's your registration variable ?, in my case, it'll show every single time you connect.