supplied argument is not a valid

[Gab Teo <doneatlast1000@xxxxxxxxx>]

Hello everyone,
 
I loaded a server for a client and I am getting the below error. 
 
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/fineart/public_html/login.php on line 169

This is the line of the error
 
$login=mysql_query("SELECT * FROM member WHERE username='$username' AND password='$password' ");  //line 168

if(mysql_num_rows($login)==0)  //line 169
 
Thanks,
 
Gab


      

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