[Jefff]

pawn Код:

new name[MAX_PLAYER_NAME];
        new string[128];
        name = pName(targetid);
        if (name[targetid] == '_')
        name[targetid] = ' ';

MAX_PLAYER_NAME is 24 so if U have ID 25+

pawn Код:

if (name[targetid] == '_')
name[targetid] = ' ';

then array is crash and gives unknown command
btw

pawn Код:

COMMAND:check(playerid,params[])
{
    new giveplayerid;
    if(IsPlayerConnected(giveplayerid))
    {

giveplayerid returns 0 here so if ID 0 is not connected command dont work xd