session problem can't pass

hello, I am developing a website which extensively use the session function of php. I have meet the following problem: the server for development was placed in the intranet originally and when it moved to DM zone yesterday, and then all session value can't pass any more! I had checked that all sid value were passed correctly between every page, but all registered session value can't pass. I saw that there is an entry: session.referer_check in the php.ini. Is it necessary to set anything in this entry if the web server was placed in DM zone? thx Wilson _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.