Broken Store

[sebman21]

When I go into administration, I get this error

 

Fatal error: Call to undefined function: tep_output_string() in /*****/store_admin/includes/functions/html_output.php on line 156

 

Lines 153-169 below of html_output.php below (line 156 has *** around it)

 

////
// Output a form
function tep_draw_form($name, $action, $parameters = '', $method = 'post', $params = '') {
*********$form = '<form name="' . tep_output_string($name) . '" action="';***********
if (tep_not_null($parameters)) {
$form .= tep_href_link($action, $parameters);
} else {
$form .= tep_href_link($action);
}
$form .= '" method="' . tep_output_string($method) . '"';
if (tep_not_null($params)) {
$form .= ' ' . $params;
}
$form .= '>';

return $form;
}

 

I tried to install Ultimate SEO Links, but I did not touch this file. My store is at www.nationwideparty.com. Any suggestions on why this is happening? Thanks