From machine B, I can use SSMS to connect to SQL Server on machine A. This is using either "New Query" or "Object Explorer".

However, on machine A, SSMS can only connect to machines A or B using the "New Query" option. If I try "Object Explorer" for either, I get the error message "Failed to retrieve data for this request... urn could not be resolved at level Configuration."

The same was happening to me without making changes on my PC or my SQL server environment.

ERROR window:

Connect to Server

Failed to retrieve data for this request. (Microsoft.SqlServer.SmoEnum)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476

urn could not be resolved at level Configuration. (Microsoft.SqlServer.SmoEnum)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476"

RESOLUTION was:

1. Open c:\Program Files\Microsoft SQL Server\90\dts\Binn\MsDtsSrvr.ini.xml

2. Modify the ServerName line to read  "(local)" or a more specific server name instead of a "."

3. Restart SQL Server service

SAMPLE:

Good luck!