How do you change your security questions if you forgot them?

You can't but if you do have a rescue email on your account, you should be able to send the answers to the questions there. If you don't, I suggest that you contact support.

https://expresslane.apple.com/Issues.action

well i keep saying "send the email" but they are not sending them to me and I dont know why

https://discussions.apple.com/docs/DOC-4551