HTML Form Submit To Self

Can someone tell me why on earth this is not submitting to self?

I have the following setup:

<?php
     print_r($_POST);
?>

 <form name="bizLoginForm" method="post" action"" >
    <table id="loginTable">
        <tr><td>Username:</td><td><input type="text" id="loginUsername" /></td></tr>
        <tr><td>Password:</td><td><input type="password" id="loginPassword" /></td></tr>
    </table>
    <input type="Submit" value="Login" />
</form>

and every time I click on the submit button i see nothing inside the POST array. What simple thing have I totally overlooked?

Thanks!