Good day!
I am newly in SQL Server 2005 and now I encountered error when i try to login. This is some of the information:

Microsoft SQL Server 2005 Express Edition

Server Type: Database Engine
Authentication:SQL Server Authentication
Login: sa

and when i press the connect button the error appear:

Cannot connect to Servername\MSFW

Additional Information:
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may because by the fact that under the default settings SQL Server does not allow remote connections. (Providers Network Interfaces error: 26-Error Locating Server/Instance Specified) (Microsoft SQL Server).

I have no idea how i can solve this problem.

Any help is highly appreciated.

Thank you in advance.