WP directory – unusual problem?

Hi there,

I got a new domain and want to install WP on it.
My situtaion is as follows:

I have three domains on one server. My root directory is /hmtl where i put three folders, one for each domain. In my domain settings I have set a redirect for the third domain to its folder. This means, that the folder of one domain should be treated as the root.

I will call the folder for the new domain /domain3. So in summary i put all wordpress files in /html/domain3/ without the wordpress folder, which means that the config.php lies directly in there. If you type in http://www.domain3.com you should see whatever is in html/domain3.

Then I installed WP from http://www.domain3/domain3/wp-admin/install.php…which is strange. Shouldn`t it already here be http://www.domain3.com/wp-admin/install.php?? Didnt work though…

Now, after installation, I can access my blog only via http://www.domain3.com/domain3…And if I want to change the blog url in settings, as described here http://codex.wordpress.org/Giving_WordPress_Its_Own_Directory it didnt work.

Do you know the solution?