Thank you for your post.
Were there any problems installing FileMaker Server 10? I'm asking because your description makes it sound like FileMaker Server 10 wasn't installed successfully.
Uninstall FileMaker Server 10, and we'll start at the beginning.
Restart the Server and make sure there are no other applications running, no virus detection software, and no activation of screen savers. Also turn off any indexing service. Also, make sure you are using a static IP address.
Once you have a plain system, install FileMaker Server 10. Make sure every is successfully installed, and then start eh Deployment assistant. If everything goes as planned, go to:
Start -> Programs -> FileMaker Server > FMS 10 Start Page
Follow this through completely, and let me know if an error is reached, where it occurs, and what is the exact wording. This should help narrow down the possibilities.