Setting cookies - Apache 1.3.27, PHP 4.3.1, Win2K, MySQL 4.0.13-max-debug, PHPLib 7.4-pre2

Using Mozilla 1.3 (HTTP Mozilla/5.0) and IE 5.50 SP 2, setcookie() does not actually set a session cookie. At one point before re-installing Apache 1.3.27, I was able to set a cookie in both browsers, but something has broken since and I have not been able to recall which of my configuration actions was responsible. I cross-compared my old httpd.conf with my new one to try to ensure the same environment on the webserver as was successful previously. PHP interprets all PHP scripts properly and I'm getting no PHP errors in my log file nor Apache errors in my error.log. I mainly use Mozilla, which is set to prompt me if a cookie wants to be set, and I have double-checked to ensure that it is not set to block cookies from localhost. I run the ZoneLabs Pro firewall but have unloaded it completely to test localhost scripts, in case it was interfering with cookies (but it hasn't interfered with any others when loaded and is set to allow localhost cookies when running). But no joy. Here is the test script I used to try setting a test cookie (first lines in script) - without calling PHPLib session (or any other) classes: <?php setcookie("osp", "hello", time()+3600, "/", ".localhost", 0); ?> <html> [...] </html> Here are HTTP-Headers from phpinfo(), which result from using PHPLib's prepend.php (from phplib 7.4-pre2) for db virtualization including session setup and have double-checked all PHPLib manual instructions (the only test that doesn't work is incrementing the SID with test.php3 - I have register_globals=Off in php.ini). Note the weird expiration date on the Set-Cookie instruction in HTTP Response (PHPLib simply uses (date()*60)+43200 to set the cookie lifetime), which should expire in 30 days from cookie set date: HTTP Request GET /test.php3 HTTP/1.1 Accept text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plai n;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1 Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Accept-Encoding gzip,deflate,compress;q=0.9 Accept-Language en-us,en;q=0.5 Cache-Control max-age=0 Connection keep-alive Host localhost Keep-Alive 300 Referer http://localhost/index.php3 User-Agent Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 User-Agent Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; T312461) HTTP Response Headers Set-Cookie osp=036aafb8e93397edd3733011430cc331; expires=Sun, 09-Nov-36 03:59:51 GMT; path=/; domain=localhost Expires Thu, 19 Nov 1981 08:52:00 GMT Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma no-cache Keep-Alive timeout=15, max=100 Connection Keep-Alive Transfer-Encoding chunked Content-Type text/html Here are my php.ini [Sessions] directives (all of these show up in phpinfo()'s Sessions block): session.save_handler=files session.save_path="C:\phpdev\php\temp" session.use_cookies=1 session.use_only_cookies=False session.name=PHPSESSID session.auto_start=0 session.cookie_lifetime=0 ; 2592000 session.cookie_path=/ session.cookie_domain=localhost session.cookie_secure=False session.serialize_handler=php session.gc_probability=5 session.gc_maxlifetime=1440 session.referer_check= session.entropy_length=0 session.entropy_file= session.cache_limiter=nocache session.cache_expire=1 session.use_trans_sid=0 url_rewriter.tags="a=href,area=href,frame=src,input=src,fieldset=" ; form=fakeentry removed for XHTML compatibility session.bug_compat_42 = 0 session.bug_compat_warn = 1 Here is my <IfModule mod_mime.c> from httpd.conf (ServerName localhost): LoadModule php4_module "c:/phpdev/php/sapi/php4apache.dll" # AddModule mod_php4.c [Note: apache -t complained - module not found - when I uncommented this] # ScriptAlias /php/ "c:/phpdev/php/" AddType application/x-httpd-php .php4 AddType application/x-httpd-php .php AddType application/x-httpd-php .php3 AddType application/x-httpd-php .inc AddType application/x-httpd-php .fire AddType application/x-httpd-php .osp AddType application/x-httpd-php .htm AddType application/x-httpd-php-source .phps # Action application/x-httpd-php "/php/php.exe" Can't think of anything else - thanks in advance, Stephen