I have included the next steps to take \ verify below:
1. Revit
Server Firewall Exceptions
Client workstations will be unable to see
the Revit Server as active, which can generate the following error, if the Firewall is not configured properly. Even
if it was verified previously I would double-check again, as I have seen
updates [or a reinstallation] flip on one of these checkboxes.
Ensure to verify and set the following on
each Revit Server [central and local]:
-Revit Server > Control Panel >
Windows Firewall > Change Settings > Exceptions
-Locate “File and Printer Sharing”
-Ensure there is an Exception for every instance of “File and Printer
Sharing”
-Click OK, restart Revit Server
2. Browse
Manually from Client Workstation
You can browse to each Revit Server from a client
workstation correct? Such as navigating
to:
\\RevitServerName\c$
3. DNS
Verify all Revit Servers appear on network DNS.
See Discussion Board Post here:
http://forums.autodesk.com/t5/Autodesk-Revit-Architecture/Revit-Local-Server-Cannot-Connect/td-p/284...
4. Environment
Variable
Can you verify the correct Revit Server name appears on
a workstation [which is not functioning correctly] under Computer properties > Advanced
System Properties > Environment Variables > User Variables for %Username%
> REVIT2011SERVER
Image Example: http://screencast.com/t/7oWLEIOx
5. Client Workstation Revit Server Admin
From a client workstation, can you connect to
the Revit Server Admin? For example,
from Internet Explorer, browse to the following location:
http://revitservername/Revitserveradmin
6. Troubleshooting Overview
Lastly, as a final check I would ensure all of the
prerequisites were completed the second time.
Please verify the steps in the blog post below have been followed, as
well as ensuring all prerequisites from the included video
have been performed on each Revit Server:
http://revitclinic.typepad.com/my_weblog/2010/10/revit-server-troubleshooting.html
If
the issue persists, let’s verify and include the following items:
1. Confirm that there are no other web
applications running on the local and central server. Then, on the Revit Server, end any w3wp.exe
processes listed. Then have a
workstation attempt to connect to Revit Server from inside Revit. This should create a new w3wp.exe process.
Please verify the user name that owns the w3wp.exe process.
2. Revit Server Log files; they can be zipped
and attached to this case [C:\logfiles].

Ryan Duell