Beginner needs help with form

[eluser]CroNiX[/eluser]
Because with HTML forms, "get" is the default method unless you specify.

That error message is because you most likely have CSRF protection enabled, but not including the CSRF token in your form. If you use the form helper with form_open(), it does it for you. I'd really urge you to use the form helpers that are available. It will help you in the long run and you also have to write a lot less code, generally.