Unable to get Sablot XSLT functions to work with WinXP

I am unable to use the XLST extensions with my current WinXP/Apache/PHP development environment. My system configuration is running WinXP OS with an Apache 1.3.22 Web Server and PHP 4.3.4. I have tried to narrow the problem by minimizing the code. I down to using a simple php program with the following simple call: $xp = xslt_create(); and the following error is displayed: "Fatal error: Call to undefined function: xslt_create()" The installations directions seemed to be simple just copy the sablot, iconv and expat dlls to the windows system32 directory. The sablot.dll, iconv.dll and expat.dll have been copied to the %windowsroot%\system32 and that path is in the "PATH" environment variable. I have searced the web on this subject. One suggestion referenced using the "extensions" directives in the php.ini file. Even though there was no sablot.dll in the "php\extensions" directory, I have played around with the "extensions" directive in the php.ini file, but with no luck. Any help on how to resolve this issue so that I can actually use the XSLT extensions would be appreciated. Thank you. Joe