Call to undefined function printer_open()

hey i want to use that function, but i cant load it :s content of php.ini: ;extension=php_pgsql.dll extension=php_printer.dll ;extension=php_shmop.dll extension_dir = "c:\php\ext" the file is =>> C:\php\ext\php_printer.dll this seems correct to me. why wont it load some more info: i use apache(apache_1.3.31-win32-x86-no_src.exe), win xp pro, mysql (mysql-4.0.20d-win.zip), php 5.0.1 (php-5.0.1-Win32.zip) this didnt work ==> multithreaded // Example loading an extension based on OS if (!extension_loaded('printer')) { if (strtoupper(substr(PHP_OS, 0, 3) == 'WIN')) { dl('php_printer.dll'); } else { dl('printer.so'); } } System Windows NT PCNICK 5.1 build 2600 Build Date Aug 12 2004 23:30:01 Configure Command cscript /nologo configure.js "--with-gd=shared" "--enable-snapshot-build" Server API Apache Virtual Directory Support enabled Configuration File (php.ini) Path C:\WINDOWS\php.ini PHP API 20031224 PHP Extension 20040412 Zend Extension 220040412 Debug Build no Thread Safety enabled IPv6 Support enabled Registered PHP Streams php, file, http, ftp, compress.zlib Registered Stream Socket Transports tcp, udp