By default, MS SQL Server doesn't have the TCP/IP protocol enabled.
You have to open Sql Server Configuration Manager, enable the TCP/IP protocol, customize port if needed (default is 1433), and restart the service.
I think by default the SQL server instances run on port number 1433. But I think it can be configured to run on other ports too.
You can find on which port your sql instance is running by following this -
Using the GUI: In SQL Server 2005, you can use the SQL Server Configuration Manager. Look under SQL Server 2005 Network Configuration and look at the TCP port for the TCP/IP protocol.
By default, MS SQL Server doesn't have the TCP/IP protocol enabled. You have to open Sql Server Configuration Manager, enable the TCP/IP protocol, customize port if needed (default is 1433), and restart the service.
Since you didn't specify much information, I'll go with the half-a-second Google route:
http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=sql+server+ports
Leads to:
http://support.microsoft.com/kb/287932
Try to specify tcp/ip port 1433
http://support.microsoft.com/kb/287932
By default, TCP port 1433 is used.
I think by default the SQL server instances run on port number 1433. But I think it can be configured to run on other ports too.
You can find on which port your sql instance is running by following this -
Using the GUI: In SQL Server 2005, you can use the SQL Server Configuration Manager. Look under SQL Server 2005 Network Configuration and look at the TCP port for the TCP/IP protocol.