HELP!! mysql_fetch_array(): supplied argument is not a valid MySQL result resource

I'm getting this error message on my browser, and have a hard time troubleshooting it.

What's wrong? Hope someone here has advice/solution...

mysql_fetch_array(): supplied argument is not a valid MySQL result resource... on line 216

Here's the code from line 213 - line 229 so you can get an idea:

      else
      {
         $query = mysql_query( "SELECT * FROM ".$config["mysqlguestbooktable"]."".$order."WHERE `id` = '".make_query_safe( $_GET['id'] )."' LIMIT 1" );
         $post = mysql_fetch_array( $query, MYSQL_ASSOC );
         $title = "Guestbook admin area";
         $subtitle = "Edit post";
         $text = "</p><form action=\"".$_SERVER['PHP_SELF']."?action=finedit\" method=\"POST\"><p>\n";
         $text .= "<input type=\"hidden\" name=\"id\" value=\"".$post['id']."\" />\n";
         $text .= "Name:<br /><input type=\"text\" name=\"name\" size=\"20\" value=\"".$post['name']."\" /><br /><br />\n";
         $text .= "Email:<br /><input type=\"text\" name=\"email\" size=\"20\" value=\"".$post['email']."\" /><br /><br />\n";
         $text .= "Comments:<br /><textarea rows=\"5\" cols=\"20\" name=\"comments\">".$post['comments']."</textarea><br /><br />\n";
         $text .= "Date:<br /><input type=\"text\" name=\"date\" size=\"20\" value=\"".$post['date']."\" /><br /><br />\n";
         $text .= "IP:<br /><input type=\"text\" name=\"ip\" size=\"20\" value=\"".$post['ip']."\" /><br /><br />\n";
         $text .= "<input type=\"Submit\" value=\"Save Edit\" />\n";
         $text .= "</p></form><p>\n";
      }
   }

Code (markup):

Specifically, the code below is from line 216:

$post = mysql_fetch_array( $query, MYSQL_ASSOC );

Code (markup):

 

It means that your query is not returning a valid resource.

Change this:

$query = mysql_query( "SELECT * FROM ".$config["mysqlguestbooktable"]."".$order."WHERE `id` = '".make_query_safe( $_GET['id'] )."' LIMIT 1" );

to this to debug...

if(!$query = mysql_query( "SELECT * FROM ".$config["mysqlguestbooktable"]."".$order."WHERE `id` = '".make_query_safe( $_GET['id'] )."' LIMIT 1" )){

die(mysql_error());

}