How to install Alternative PHP Cache in Windows?

I have sent the below email to the 3 maintainers of APC but not yet receive any response. Hope I can get quick suggestions here. >> I tried to install APC on my windows 2000 machine but failed. My machine has Apache 2.0.55/php 5.1.1 installed, without Zend Optimizer. Here are the procedures I did: 1. download php_apc.dll from http://pecl4win.php.net/list.php/5_1 2. copy php_apc.dll to c:\php\ext 3. add extension=php_apc.dll in php.ini 4. add APC configuration in the end of php.ini [APC] apc.enabled = 1 apc.shm_segments = 1 apc.shm_size = 30 apc.optimization = 1 apc.num_files_hint = 1000 apc.ttl = 0 apc.gc_ttl = 3600 apc.cache_by_default = On apc.filters = apc.mmap_file_mask = apc.slam_defense = 0 apc.file_update_protection = 2 apc.enable_cli = 0 5. create folder c:\tmp When I tried to start Apache, an error window popped out saying "c:\php\ext\php_apc.dll is a invalid/illegal win32 application". I also tried the php_apc.dll for php 4.4.x and failed too. What is the problem? Would you like to give some suggestions? Thanks in advance. <<