problem with install a vpn connection
 

hi
I wanna to have a vpn conncetion in a lan to access the internet(vpn server of my company is ke windows)
for this I read some paper,and so I going to install pptpconfig and its essential packages.
but when I run pptpconfig this error appear:
[root@linux Desktop]# pptpconfig

Warning: dl(): Unable to load dynamic library '/usr/lib/php-pcntl/lib/php/extensions/no-debug-non-zts-20020429/php_gtk.so' - libxml.so.1: cannot open shared object file: No such file or directory in /usr/bin/pptpconfig.php on line 31

Fatal error: Cannot instantiate non-existent class: gdkcolor in /usr/bin/pptpconfig.php on line 96

and I dont know whats the problem.
if my way to have a vpn connection is wrong please guide me.
my system is CentOS 4.3 and Iam in a LAN and our VPN server is windows.

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