Login redirecting problem

Hi,

When I login as my test user it doesn’t login, it simply keeps looping back to the login page after answering a math question to make sure I am not a bot. I have two queries

1. How can I remove this math question? I do not wish to identify if anyones a bot.
2. How can I get the login to work as it should and actually log users in and direct to the main contents page?

The page I need help with: [log in to see the link]