[Isolated]

Basically your sscanf line is messed up

pawn Код:

COMMAND:setadminlevel(playerid, params[])
{
    new targetid, level;
    if(!sscanf(params, "ui", targetid, level)) return SendClientMessage(playerid, -1, "USAGE: /setadminlevel [ID] [LEVEL]");
    if(IsPlayerAdmin(playerid))
    {
        pInfo[targetid][Adminlevel] = level;
        // HI YOU MADE SOMEONE ADMIN
    }
    else return SendClientMessage(playerid, -1, "ERROR: You are not permitted to use this command.");
    return 1;
}

Try that, report any errors/problems