Exception during connecting to sql server2005

[amrut sabade]

Hii Everyone wen i tried to net conn from driver manager i got following exception i am using to connect to sqlserver which is on my local machine...

try
	{
		Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
		System.out.println("driver found");
		Connection con =DriverManager.getConnection("jdbc:sqlserver://");
		System.out.println("connection avaliable");
	}
	catch(Exception e)
	{
		e.printStackTrace();
	}

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1033)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:817)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:700)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:842)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Abc.demo.main(demo.java:17)

[Tom Reilly]

Did you do everything that the error suggested?

Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".