Problem with Admin panel

[carlosnegri]

I´m having a little problem with Admin panel. Every time I try to change something, like shipping method, the follow message appear on the screen:

 

Warning: Cannot modify header information - headers already sent by (output started at /home2/perfectf/public_html/admin/includes/application_top.php:210) in /home2/perfectf/public_html/admin/includes/functions/general.php on line 18

 

And more, when I go to my site and try to add an item to cart it shows:

 

Your Shopping Cart is empty!

 

I tried to restore my backup and it didn´t work, checked the session on Admin panel, everything ok.

 

Can somebody help me?

 

thanks

 

Carlos

[carlosnegri]

When I try to login and go to my account, it ask me again for the login.

 

thanks

 

Carlos