captch & sessions

[eluser]shmoula[/eluser]
Hi! I have similar problem, but im using flash_sessions. Captcha (flash session data) works just in first passing through form:

CommentForm -> submit -> it works, then refresh the CommentPage with CommentForm -> submit -> doesnt work, flash_session is empty.

And when i access page with form standard way (from some referer page, not just via redirect), it works again.

Any ideas anyone? Thanks in advance!