PHP - Error retrieving data

Hi,

I am trying to setup my sql express 2008 R2 setup to allow php access.  The following code seems to work:

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$serverName = "myserver";

$connectionOptions = array("Database"=>"sakila");

$conn = sqlsrv_connect( $serverName, $connectionOptions);

if( $conn ) {

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However, the next section that retrieves data returns 0 rows. 

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$resultdb = sqlsrv_query($conn, "Select * from UserNames");
$row_count = sqlsrv_num_rows($resultdb);

echo "num rows:";

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I've tried looking at the sql_errors array, but it didn't display anything.  I've been searching for 2 days now for any solutions.  Any suggestions greatly appreciated.  

Thx in advance.