[Koha] koha and zebra problem

Hi When i run zebrasrv-2.0 -f /etc/koha/koha-conf.xml , i will get error message as below "zebrasrv-2.0: Option -f unsupported since YAZ is compiled without Libxml2 support" what happen i dont know please help me to solve thois problem, i had installed : Yaz 3.0.45 IDzebra 2.0.18 thnks _________________________________________________________________ Show them the way! Add maps and directions to your party invites. http://www.microsoft.com/windows/windowslive/products/events.aspx