IIS7 on Win2008 – localhost not accessed but from external web OK

Welcome,

1. Windows Server 2008 with Domain Controller on public domain and IIS7.

2. Page like www.company.com from external browser works good. It’s OK.

3. The same page like www.company.com from internal browser from server or any another workstations from local network not works.

4. Page http://localhost on this server return message like this:
“HTTP Error 404. The requested resource is not found.”

5. But now, when I change from my manually configured site to “Default Web Site” it’s works good, when in local browser on server I write address like: www.company.com
Still http://localhost not work.