When attempting to connect to SQL server database using Dynamics NAV SQL client, you may recieve the following message:
The Server cannot be found. Try again later or contact your system administrator.
Server: Windows Server 2008 (any edition)
SQL Server: Microsoft SQL Server 2008 (any edition)
Dynamics NAV: 2009 SP1
A solution on how to open the firwall port can be obtained fromthe following Microsoft Knowledge base article:
Hope you find this helpful