http to https session problem

Hey ladies & gents I am having a little problem with users keeping the same session id when they go from http to https... is there a work around for this... I don't appear to have this problem when using openSSL just when the site has it's own certificate. should I store the session id in a cookie??? or is there another way or setting -- Joe Harman --------- Do not go where the path may lead, go instead where there is no path and leave a trail. - Ralph Waldo Emerson