I get this error message … what am I missing?

add_filter( 'wp_nav_menu_items', 'avia_append_paypal', 10, 2 );

function avia_append_paypal ( $items, $args )
{

if ((is_object($args) && $args->theme_location == 'avia') || (is_string($args) && $args = "fallback_menu"))
{
global $avia_config;
ob_start();
?>

<!– <form action=”https://www.paypal.com/cgi-bin/webscr&#8221; method=”post” target=”_top”>
<input type=”hidden” name=”cmd” value=”_s-xclick”>
<input type=”hidden” name=”hosted_button_id” value=”EZHM85HZJNUKL”>
<input type=”image” src=”https://www.paypalobjects.com/en_US/i/btn/btn_buynow_SM.gif&#8221; border=”0″ name=”submit” alt=”PayPal – The safer, easier way to pay online!”>

</form>

–>

<?php
$paypal_link = ob_get_clean();

$items .= '<li id="menu-item-paypal" class="noMobile menu-item">'.$paypal_link.'';
}
return $items;
}