[Facerafter]

Not sure what else it could be.

You could try this:

pawn Код:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    switch(dialogid)
    {
        case D_REG:
        {
            new string[128];
            if(response == 0)
            {
                print("Kicking player");
                Kick(playerid); 
            }

And than test it, than you could find out the origin of the problem.
If it gets printed its here if not its somewere else.