if(PlayerInfo[playerid][pAdmin] >= 1)

if(strcmp(cmd, "/explode", true) == 0)
    {
        GetPlayerName(playerid, sendername, sizeof(sendername));
        tmp = strtok(cmdtext, idx);
        if(!strlen(tmp) && PlayerInfo[playerid][pAdmin] >= 4)
        {
            SendClientMessage(playerid, COLOR_GREY, "/explode [Playerid]");
            return 1;
        }
        giveplayerid = strval(tmp);
        GetPlayerName(giveplayerid, giveplayer, sizeof(giveplayer));
        GetPlayerName(playerid, sendername, sizeof(sendername));
        if(IsPlayerConnected(giveplayerid))
        {
            if(PlayerInfo[playerid][pAdmin] >= 1)
            {
                if(IsPlayerConnected(giveplayerid))
                {
                    format(string, sizeof(string), "AdmCMD: %s was exploded by %s",giveplayer, sendername);
                    ABroadCast(COLOR_LIGHTRED,string,1);
                    //SendClientMessageToAll(COLOR_DBLUE, string);
                    SetPlayerHealth(giveplayerid, 10);
                    new Float:boomx, Float:boomy, Float:boomz;
                    GetPlayerPos(giveplayerid,boomx, boomy, boomz);
                    CreateExplosion(boomx, boomy , boomz, 7, 10);
                    new PlayerName[30];
                    GetPlayerName(playerid, PlayerName, 30);
                    printf("[Command] %s has used /explode to explode %s", PlayerName, giveplayer);
                }
                else
                {
                    format(string, sizeof(string), "%d is not an active player.", giveplayerid);
                    SendClientMessage(playerid, COLOR_RED, string);
                }
            }
            else
            {
                SendClientMessage(playerid, COLOR_RED, "You do not have permission to use that command!");
            }
        }
        else
        {
            SendClientMessage(playerid, COLOR_RED, "You Must be logged in to use this command!");
        }
        return 1;
    }

C:\Documents and Settings\Usuario\Mis documentos\samp\pawno\include\AdminSystem.inc(184) : error 017: undefined symbol "sendername"
C:\Documents and Settings\Usuario\Mis documentos\samp\pawno\include\AdminSystem.inc(184) : error 017: undefined symbol "sendername"
C:\Documents and Settings\Usuario\Mis documentos\samp\pawno\include\AdminSystem.inc(184) : error 029: invalid expression, assumed zero
C:\Documents and Settings\Usuario\Mis documentos\samp\pawno\include\AdminSystem.inc(184) : fatal error 107: too many error messages on one line

new sendername;

new sendername[MAX_PLAYER_NAME];