Problem with the shopping cart

3 days ago
when you go to the trash, it throws it out and asks you to log in again. Where to go?
3 days ago
What do you mean by Trash ?
What operation are you performing ?
Is there an errors in the Log ?
18 hours ago
I didn't mean trash ,but shopping cart. The buyer selects the product, adds it to the shopping cart ,and when entering it, throws it on the login form(username and password).
13 hours ago
Form to login is shown even if he is logged?
That is for a specific user or all users?
Have you checked the system log?

12 hours ago
Are you using a farm (multiple servers)?  Maybe you need to use a MachineKey setting in your web.config