How can I install a web application to the document root?

[Ville Talus]

I'm having a little bit of a problem when installing a web application to the document root. When creating a domain, is there some setting that enables or disables the document root option?

I'm asking this because some times the document root option is disabled. I can't find any reason for this. I've tried to change settings but it doesn't work. I've also tried to read admin and reseller guide but seems to be nothing there.

Can somebody help me please?