DB 에러

그누스킨G4 에 적용된 별점주기 : 정상 >> G5 에 사용하니 : 에러발생

그누보드 G4 에서는 정상
<?
$cmtpoint ='0'; 
$totalcount = '0'; 
$userrating = '0'; 

$tbl = "{$g4[write_prefix]}{$bo_table}"; 
$sql2 = " select wr_3 from $tbl  where wr_is_comment > 0 && wr_parent = '{$list[$i][wr_id]}' && wr_3 > '0' "; 
$result2 = sql_query($sql2); 

while($row2 = mysql_fetch_array($result2)  ) { 
$point=$row2[0]; 
$cmtpoint=$cmtpoint + $point; 
$totalcount++; 
} 

if ($totalcount!=0) { 
$cmtpoint= $cmtpoint/$totalcount; 
$cmtpoint= number_format($cmtpoint,2); 
} 
        echo "<a href='{$list[$i][href]}'>";
 ?>

그누보드 G5 에서는 
<?
$cmtpoint ='0'; 
$totalcount = '0'; 
$userrating = '0'; 

$tbl = "{$g5[write_prefix]}{$bo_table}"; 
$sql2 = " select wr_3 from $tbl  where wr_is_comment > 0 && wr_parent = '{$list[$i][wr_id]}' && wr_3 > '0' "; 
$result2 = sql_query($sql2); 

line 344 : while($row2 = mysql_fetch_array($result2)  ) { 
$point=$row2[0]; 
$cmtpoint=$cmtpoint + $point; 
$totalcount++; 
} 

mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/jone/public_html/theme/company/skin/board/fz_gallery_circle_/list.skin.php on line 344

if ($totalcount!=0) { 
$cmtpoint= $cmtpoint/$totalcount; 
$cmtpoint= number_format($cmtpoint,2); 
} 
        echo "<a href='{$list[$i][href]}'>";
 ?>

아래 에러메시지
mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/jone/public_html/theme/company/skin/board/fz_gallery_circle_/list.skin.php on line 344