Help please

[a3fire]

GUYS HOW TO HELP i installed new windows and setup the my sql server but when i open it and press connect i get this error


ADDITIONAL INFORMATION:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

any solution ? T_T

[MentaL]