Error during the install.php stage

[efex]

I'm getting this error installing Sitebuilder.

Fatal error: Call to undefined function: domxml_new_xmldoc() in /usr/local/sitebuilder/include/classes/class.config.inc on line 30

 

[Dmitry Frantsev]

I have met such problem before and this means that domxml extension for php is not initialized. I had to install php-domxml package. Try to install it also. Hope it helps.