Relocate Site except wp-admin

Hello,

at first thank you very much for this great plug-in.

I want to redirect the whole Site to an excisting excepting wp-login and admin, an simple 301. It works all fine, i can install all the plug-ins and manage the media etc. on the redirected page. I can also create new posts and add media to my wordpress, BUT if i click to “Pages” or “Pages -> All Pages” it redirect me to the excisting site i setted up in the “Relocate Site” Tab of the Plug-In. “Pages -> Add New” works fine…
Why i can′t add new pages and it redirects me? Is there an workaround for it?

The Background of all this ist, i have an excisting site. I also got an excisting domain which i redirect to the excisting site. Now i wan′t to make a new webpage for the excisting domain, BUT while i′m on making the new webpage for the excisting domain i want to redirect the whole traffic to the excisting site and also have the access to the backend of Worpdress for the new webpage.