Very strange problem with session files

I have WindowsNT4 Serv & PHP 4.0.6/CGI My php.ini includes: (...) session.save_handler = files session.save_path = /tmp session.use_cookies = 1 (...) Problem: When I run PHP script which uses sessions (commands like session_start() etc.) the session file IS created in /tmp BUT cannot be received and added to my URL. My browser (IE5.5PL SP1) receives message: Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in I:\(...)\test.php on line 0 I checked. The session data was created! I CAN read them directly by another script also in PHP: (...) <? $fd = fopen("$path/$filename", "r") or die("<h3>Cannot read $path/$filename</h3>"); print fread($fd, filesize("$path/$filename")); fclose($fd); ?> It seams very strange. PHP do create session data but display error "Failed to write". What can be incorrect with session.save_path? I checked, the session data is created correctly. I can read that file. What is goin' on? Anybody can help? -- Jarek