Http Errors

hi

i created endpoints and able to view wsdl

http://<servername>/hello_world
it's a stored procedure created in master database.
when i just try to view the output from this like

http:///<servername>/hello_world

it's giving me an error http501/http505 error.

i read in other article like, when soap is not able to process message , it'll be giving out as http errors.

my endpoint creation is as follows:


CREATE ENDPOINT hello_endpoint
STATE = STARTED
AS HTTP(
PATH = '/hello_world',
AUTHENTICATION = (INTEGRATED ),
PORTS = ( CLEAR ),
SITE = 'testserver'
)
FOR SOAP (
WEBMETHOD 'GetSqlInfo' (name='master.dbo.hello_world', SCHEMA=STANDARD ),
WSDL = DEFAULT,
BATCHES = ENABLED,
DATABASE = 'master',
NAMESPACE = 'http://testserver/hello_world'
);

GO



i already created a stored procedure hello world:

USE [master]
GO

CREATE PROCEDURE [dbo].[hello_world]
(@msg nvarchar(256)= "Hello Sql Server")
AS BEGIN
select @msg as 'message'
END


.I am not able to find any solution for this.Any help would be a great help for me.
i joined a new project , and this is the first task for me.

thanks for all

priyaram