mySQL Data

Hi
I am having trouble getting a snippet to fetch data from a mysql database, is there any reason why it would not work.

code is as follows….

if ($dbc = mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME)) { // Make the connnection.
echo “CONNECTED”; }

$selection = mysqli_query($dbc,”SELECT * FROM popups”);

if (mysqli_num_rows($selection)>0) { echo “working”; }
…. end of code

“CONNECTED” is displayed but “working” isn’t displayed.

Thanks in advance