hi jfisher,
the problem is not with the wrong http request.It is correct because i am able to hit the webservices.In the exception it clearly says that:
System.Data.SqlClient.SqlException:Procedure or function getCurrencyByCountry expects parameter '@name' which was not supplied at WebServicex.country.GetCurrencyByCountry(String CountryName)

SoapAction value i have taken from wsdl.so it is correct

i think i am passing parameter wrongly..do u have any other idea of passing the parameter.