500 server error when I try to buy a course or subscribe in a conversation

When I try to buy a course or subscribe in a conversation, 500 server error is showed.

I’m using Firefox 3.5 and IE 8.

Hi kendyosiro,

I’m very sorry about that. We are looking into it. I will let you know when we have fixed the problem.

Mark, the problem has fixed. thanks.

That’s great! Thanks, kendyosiro.