chaos with structure of the domain and the host

Hello, I have employed the domain http://www.theweirdworldof.com with piensasolutions.com and the blog of wordpress is lodge in the host lapausa.freehostia.com.
I want that the domain mask “www.theweirdworldof.com” appears also in the searches that the people do in google, and google send to them to my web. At present, google index the web like lapausa.freehostia.com/ news/ejemplo.htm and not with the web masked in the way http://www.theweirdworldof.com/news/example.htm.

If I change the options of wordpress “Direction of WordPress (URL)” y “Direction of the Blog (URL)” to http://www.theweirdworldof.com, so that the structure when the people into the blog or the post are http://www.theweirdworldof.com / 2008 / 10 / example /, The problem that come up is that, on having tried to gain access to the web, it initiates the load but in the end it does not appear nothing and everything appear in white. Then I cannot also access to the manager to undo the change and I have to go to the database and to modify them manually.

I have tried to add also this to the file.htaccess but without any effect:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.theweirdworldof.com$
RewriteRule ^.*$ http://www.theweirdworldof.com%{REQUEST_URI} [R=permanent,L]

What am I doing bad? What must I do so that all this works correctly?. Thanks.