Supplied argument is not a valid MySQL result resource

[D8TA]

Help, I try to post a message and get this error, yet I click on the home button and my message is there?? What is causing this error.
2: Supplied argument is not a valid MySQL result resource (/home/jason/highlandchristianchurch-www/yabbse/Sources/Post.php ln 744)

Thanks and God Bless

[D8TA]

Help, I try to post a message and get this error, yet I click on the home button and my message is there?? What is causing this error.
2: Supplied argument is not a valid MySQL result resource (/home/jason/highlandchristianchurch-www/yabbse/Sources/Post.php ln 744)

Thanks and God Bless

www.highlandchristianchurch.com/yabbse/index.php

[D8TA]

OK I completely started from scratch and even overwrote my old files with the bug fix ones. I still get the same error in my post.php in 744, exact error. Will someone please help me. I have been through this help board, spent close to two hours looking at all the post that had error messages or something in them. I tried to do a search and no results showed up. Please someone tell me how to fix this and what caused it to happen. Thanks and God Bless.    

[Jeff Lewis]

From post.php, post the few lines before 744.

[D8TA]

From post.php, post the few lines before 744.

$subject,$threadid,$txt,$cgi,$db_prefix,$realemail,$doLimitOne,$username;
   $request = mysql_query("SELECT notifies FROM {$db_prefix}topics WHERE (ID_TOPIC=$threadid && notifies!='') LIMIT 1");
   if (mysql_num_rows($request) != 0)
   {
      $row = mysql_fetch_row($request);

      $members = mysql_query("SELECT emailAddress, notifyOnce, memberName FROM {$db_prefix}members WHERE ID_MEMBER IN ($row[0]) && emailAddress!='' && memberName!='$username'");
      while ($rowmember = mysql_fetch_array($members)) {
         $send_subject=$txt[127].": ".$subject;

         if ($rowmember['notifyOnce'] == 1) {
            $request = mysql_query("SELECT notificationSent FROM {$db_prefix}log_topics WHERE memberName='$rowmember[memberName]' && ID_TOPIC=$threadid $doLimitOne");
            if (mysql_num_rows($request) == 0)
               $notificationSent = 0;
            else
               list($notificationSent) =

[D8TA]

Thanks I got it to work. For reference for anyone else this is what I did:
change this on Post.php line 744:

Code:
$members = mysql_query("SELECT emailAddress, notifyOnce, memberName FROM {$db_prefix}members WHERE ID_MEMBER IN ($row[0]) && emailAddress!='' && memberName!='$username'");

to

Code:
$members = mysql_query("SELECT emailAddress, notifyOnce, memberName FROM {$db_prefix}members WHERE ID_MEMBER IN ('$row[0]') && emailAddress!='' && memberName!='$username'");