Iframe and SSO

Hello,

I have got problem with embedding inotes client using an iframe. When accessing main page user had authenticated with servers that uses SSO but when he tries to open page where iNotes client is embedded into iframe he needs to input login info once more. Does any one know if there is a way to authenticate the user using cookie from the first authentication ? May there is a way to change header that iframe uses or some parameter exists that would allow me to pass the session info through parameters?