[ThaCrypte]

You shouldn't put the timer there.
Make it like

pawn Код:

COMMAND:kick(playerid, params[])
{
    // CMD
    // When the playername = valid etc etc
    sendclientmessage(PlayerToKick, -1, "You have been kicked")
    SetTimerEx("KickTimer", 15, 0, "d", PlayerToKick);
    return 1;
}

Above that, you make:

pawn Код:

forward KickTimer(playerid);
public KickTimer(playerid)
{
    Kick(playerid);
}