Salam untk semua Kaskuser.
Saya ada ketemu Error di Web saya
"
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/buy4php/public_html/matrix/matrixpro/purchasepos.php on line 99"

<?php

 session_start();

include "header.php";

include "config.php";

if (!isset($_SESSION["username_session"]))

{



?>

 <form action=login.php method=post>



<br><br><Center><table><tr><td colspan=2 align=center><h3>Members Login Area</h3></td></tr>

<tr><td>Username</td><td><input type=text name=id></td></tr>

<tr><td>Password</td><td><input type=password name=password></td></tr>

<tr><td>�</td><td>

<a href="forgot.php"><font face="Verdana,Arial,Helvetica" size="1" color="#000000"><b>Forgot Your Password?</b></font></a></td></tr>

<tr><td colspan=2 align=center><input type=submit value="Log In"></td></tr> 

</table></form>







<?php

 }

 else

{



middle();

} 



function middle()

{

include "config.php";

 $id=$_SESSION["username_session"];

 $username=$_SESSION["username_session"];

 $rs = mysql_query("select * from users where Username='$id'");

 $arr=mysql_fetch_array($rs);

 $ref_by=$arr[11];

 $status=$arr[14];

 $unpaid=$arr[16];



$err=0;

$errmsg="";



if($status==2) {

if($multipurchaseallowed==0) {

if($pospurnextlevel==0) {

$err=1;

$errmsg="<br><b>You are not allowed to purchase more than 1 position in the system.</b><br>";

}

else {

$ll=0;

$lastl=0;

$rsm=mysql_query("select * from membershiplevels order by ID");

while($arrm=mysql_fetch_array($rsm)) {

$lastl=$arrm[0];

$rsm1=mysql_query("select * from matrix$arrm[0] where Username='$username'");

$num=mysql_num_rows($rsm1);

if($num>0) $ll=$arrm[0];

}



if($ll==$lastl) {

$err=1;

$errmsg="<br><b>You are not allowed to purchase more than 1 position any matrix level and you already have a position in each matrix level.</b><br>";

}



} 

} else {



if($pospurnextlevel==0) {

$rsm=mysql_query("select * from membershiplevels order by ID limit 0,1");

while($arrm=mysql_fetch_array($rsm)) {

$rsm1=mysql_query("select * from matrix$arrm[0] where Username='$username'");

$num=mysql_num_rows($rsm1);

if($num>($maxposperlevel-1)) {

$err=1;

$errmsg="<br><b>You have already purchased the maximum number of allowed position in the system.</b><br>";

}

}

} else {

$chk=0;

$rsm=mysql_query("select * from membershiplevels order by ID");

$chk1=mysql_num_rows($rsm);

while($arrm=mysql_fetch_array($rsm)) {

$rsm1=mysql_query("select * from matrix$arrm[0] where Username='$username'");

$num=mysql_num_rows($rsm1);

if($num>($maxposperlevel-1)) $chk++;

}



if($chk==$chk1) {

$err=1;

$errmsg="<br><b>You have already purchased the maximum number of allowed position in the system.</b><br>";

}



}



}

}



$rsm1=mysql_query("select * from matrix$startmatrix where Username='$username'");

[B]$snum=mysql_num_rows($rsm1);[/B]



?>

<table width="100%" border="0" cellspacing="0" cellpadding="0">

 <tr>

 <td height="10" colspan="2">�</td>

 </tr>

 <tr>

 <td align="left" class="bodytext" width="150" valign="top"><br> 

<p align="left"> �<br><font face=verdana size=2><a href="login.php">Members Home</a><br><br> 

<a href="purchasepos.php">Purchase Position(s)</a><br><br>

<a href="stats.php">Stats</a><br><br>

<a href="managepos.php">Matrix Positions</a><br><br>

<a href="withdrawal.php">Withdrawal</a><br><br>

<a href="ads.php">Promotional Center</a><br><br>

<a href="banners.php">Banner Advertisement</a><br><br>

<a href="textadv.php">Text Ad Advertisement</a><br><br>

<a href="sbanners.php">Side Banner Advertisement</a><br><br>

<a href="bonus.php">Bonus</a><br><br>

<a href="update_pf.php">Profile</a><br><br>

<a href="submittestimonials.php">Submit Testimonials</a><br><br>

<a href="logout.php">Logout</a>

</font></p>

</td><td align="left" class="bodytext" width="500" valign="top">

<table border="0" width="98%"><tr><td><font face="verdana" size="3"><b><p align="center">Purchase Position(s)</b></font></p>

<br><font face=verdana size=2>

<?php



if($err==1) {

echo $errmsg;

}

else {

if(!$_POST) {

?>

<form action=purchasepos.php method=post>

Position: <select name=package>

<?php

if($snum==0) {

$rsm=mysql_query("select * from membershiplevels where ID=$startmatrix");

while($arrm=mysql_fetch_array($rsm)) {

 echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

}

}

else {

if($status==1) {

$m=0;

$rsm=mysql_query("select * from membershiplevels order by ID");

while($arrm=mysql_fetch_array($rsm)) {

$m++;

if($m==1) echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

else {

if($pospurnextlevel==1) echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

}



} // End of Membership Levels check

} // End of free membership status

else {

$rsm=mysql_query("select * from membershiplevels order by ID");

while($arrm=mysql_fetch_array($rsm)) {

$rsm1=mysql_query("select * from matrix$arrm[0] where Username='$username'");

$num=mysql_num_rows($rsm1);



if($pospurnextlevel==0) {

if($num>0&&$multipurchaseallowed==1&&$num<$maxposperlevel)

 echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

}

else {

if($num==0)

 echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

elseif($multipurchaseallowed==1&&$num<$maxposperlevel) 

 echo "<option value=$arrm[0]>$arrm[1] Position for $$arrm[2]</option>";

}



} // End of Membership Levels check

} // End of pro membership status

}

?>

Line 99 adalah coding yang saya kasih BOLD $snum=mysql_num_rows($rsm1);

Mohon koreksi dan Bantuan agan2 ..
Kira2 error nya knapa y?
Saya sangat berterima kasih sekali atas bantuan agan2 semuanya

Wassalam
Ahmad..