Fatal error: Call to a member function add_wishlist()

[renrom]

Dear all,

I am getting the following error everytime I try to add a product to the wishlist

Fatal error: Call to a member function add_wishlist() on a non-object in /home/....../wishlist.php on line 25

The following is the code on line 25:

   if(tep_session_is_registered('wishlist_id')) {
 $wishList->add_wishlist($wishlist_id, $attributes_id); 
  

Furthermore I am also getting the same errors when I try to log in and also log off. Can anyone help please?

[Tripic]

Fatal error: Call to a member function add_wishlist() on a non-object in /home/....../wishlist.php on line 25

Your getting this error when you log in and log out?