new user- error message-please help

[AdminPOPD]

I am a new user of oscommerce so i understand that the problem is what i did and not a problem with oscommerce. I was trying to change the text on the main page. I made several small changes and they worked fine. Then i tried to take out the rest of the main text and did somethng wrong. I am still in the building stage.

Now i have the error message:

Fatal error: Call to a member function add_current_page() on a non-object in /home/popdno5/public_html/public/includes/application_top.php on line 312

 

I was able to find the code line easy enough, I am just not sure what to do to remedy the problem

www.popdnozzleguard.com

Thanks for any help,

Peter

 

} else {

tep_session_register('navigation');

$navigation = new navigationHistory;

}

$navigation->add_current_page(); <- line 312

 

// Shopping cart actions

if (isset($HTTP_GET_VARS['action'])) {

// redirect the customer to a friendly cookie-must-be-enabled page if cookies are disabled

if ($session_started == false) {

tep_redirect(tep_href_link(FILENAME_COOKIE_USAGE));

[AdminPOPD]

Problem Sloved