SQL Server 2oo8: Error 1326

This error happens when you want to connect to another server, due to the instance name does not exist and that SQL Server is configure to allow remote connection; the SQL Server could not connect following by error message



To fix this problem
Following next steps:
1-Control panel >> double click on firewall windows >> Exceptions tab>> add port.



2-Make port for SQL:
Name:SQL
Port:1433
>>ok



3-finally, a port appears.
Click ok.