im looking at the link datlaocai.com and see its centos apache default page.
so.. its not an added domain, is this the domain u use for yourself?
Anyway.. what u could try is to install the custom one, and use the path of the apache install that is now serving u this page, but i think u have other problem.
To me it seems strange that i see a centos apache default page where i expect a cwp default apache page.
perhaps Dandeep knows if that is true