When add to cart cart page is empty

When i add something to my cart and then visit the cart page the cart appears to be empty. I already increased the memory limit to 64MB and updated the enfold theme to the lastest version but the error still occurs. I found someone with the similar problem but the conversation went on in private and therefore didnt help anybody else but the person itself. What do i have to do to fix this?

Thanks in advance,

Rhodo