[J0sh...]

PHP код:

 enum _PSTATS
{
    pLayaName[24],
    pPassword[35],
    pKills,
    pDeaths,
    pMoney,
    pLevel,
    pSkin
} 
stock SavePInfo(playerid)
{
    if(GetPVarInt(playerid, "LoggedIN") == 1)
    {        
       PVar[playerid][pSkin] = GetPlayerSkin(playerid);
       new
            Query[600];
        format(Query, sizeof(Query), "UPDATE `playerinfo` SET `kills` = %d, `deaths` = %d, `money` = %d, `Level` = %d, `Skin` = %d WHERE `user` = '%s'", // Also remember to update this...
        PVar[playerid][pKills],
        PVar[playerid][pDeaths],
        GetPlayerMoney(playerid),
        PVar[playerid][pLevel],
        PVar[playerid][pSkin],
        pName(playerid));
        mysql_query(Query);
        mysql_free_result();
        return 1;
    }
    else return 0;
}
stock ResetPVars(playerid)
{
    PVar[playerid][pLevel]         = 0;
    PVar[playerid][pKills]         = 0;
    PVar[playerid][pDeaths]     = 0;
    PVar[playerid][pMoney]         = 0;
    PVar[playerid][pSkin]         = 0;
} 


That should be correct.

By the way, if you're new to MySQL, you should really upgrade to the latest.