[Konstantinos]

You can either use:

pawn Код:

if(!response)
{
    KickWhenNotRegister(playerid);
    return 1;
}

pawn Код:

if(!response)
{
    KickWhenNotLoggedIn(playerid);
    return 1;
}

since it does not return any value or:

pawn Код:

stock KickWhenNotRegister(playerid)
{
    SendClientMessage(playerid, -1, "{ff0000}=KICKED=: {ffffff}To play here, you must register an account here! Sorry!");
    SetTimerEx("KickWithMsg", 1000, 0, "d", playerid);
    return 1;
}

stock KickWhenNotLoggedIn(playerid)
{
    SendClientMessage(playerid, -1, "{ff0000}=KICKED=: {ffffff}To continue your session, it's necesscary to login to your account! Sorry!");
    SetTimerEx("KickWithMsg", 1000, 0, "d", playerid);
    return 1;
}

with:

pawn Код:

if(!response) return KickWhenNotRegister(playerid);
if(!response) return KickWhenNotLoggedIn(playerid);