Pear Installation on Windows

I'm trying to install Pear on a Windows 2000 Server that's running PHP 4.3.10. I continue to get the following error during installation: Installation in progress ... 70 % 100 % Downloading PHPUnit-1.2.0.tgz ... Starting installation ... Loading zlib: ok Downloading package: PEAR-stable......ok Downloading package: Archive_Tar-stable....ok Downloading package: Console_Getopt-stable....ok Downloading package: XML_RPC-stable....ok Downloading package: Pager............ok Downloading package: HTML_Template_IT....ok Downloading package: Net_UserAgent_Detect....ok Downloading package: PEAR_Frontend_Web....ok Bootstrapping: PEAR...................(remote) ok Bootstrapping: Archive_Tar............(remote) ok Bootstrapping: Console_Getopt.........(remote) ok Downloading package: DB...............ok Downloading package: Net_Socket.......ok Downloading package: Net_SMTP.........ok Downloading package: Mail.............ok Downloading package: XML_Parser.......ok Downloading package: PHPUnit..........ok Extracting installer.................. Warning: main(PEAR.php): failed to open stream: No such file or directory in E:\Inetpub\wwwroot\pear\Archive\Tar.php on line 21 Fatal error: main(): Failed opening required 'PEAR.php' (include_path='C:/WINNT/TEMP/gop14.tmp') in E:\Inetpub\wwwroot\pear\Archive\Tar.php on line 21 Pear Installation E:\inetpub\wwwroot\pear Pear Lib E:\inetpub\wwwroot\lib I've tried to change the include_path in the php.ini file, but nothing seems to fix this isue. Thanks in advance for any assistance. Best regards, Michael