session_set_cookie_params

Hi, I've read the official manual on session handling, as well as the section in "PHP Developer's Cookbook" (2/e, Hughes & Zmievski). But I still cannot make a cookie persist across browser sessions -- very frustrating. I use PHP 4.1.1 running as a CGI in Win32. Here is a snippet: ====================== $lifetime = time() + 8600; session_name('app'); session_start(); .... session_set_cookie_params ($lifetime, '', '.site.com'); // session_get_cookie_params returns the expected values .... $_SESSION['userdata'] = $data; // Browser, however, says the cookie is due to expire at the end of session (and it does). ====================== What am I missing here? Thanks. Also, BTW, I notice the above-mentioned book says session_set_cookie_params returns o (failure) or 1 (success), but the official documentation says it returns nothing (void). Is the book in error or is it describing an earlier version?