VS2008 and WCF

I have a trouble with WCF in the following code. Have created a
[ServiceContract] and stuff.
Now i am trying to host by writing code... Host only starts running in
administrator mode. but when client(Vs2008 Add Service Reference) makes a
reference it give error and I have no clue of the source of error. Problem
is we had tried such small stuff in betas and now it not working smothly in
VS2008


ERROR when adding a ServiceReference form Client when service is up and
running
There was an error downloading 'http://localhost:8000/HelloService/MyService'.
The request failed with the error message:
--
<s:Envelope
xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><s:Fault><faultcode
xmlns:a="http://schemas.microsoft.com/ws/2005/05/addressing/none">a:ActionNotSupported</faultcode><faultstring
xml:lang="en-US">The message with Action '' cannot be processed at the
receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This
may be because of either a contract mismatch (mismatched Actions between
sender and receiver) or a binding/security mismatch between the sender and
the receiver. Check that sender and receiver have the same contract and the
same binding (including security requirements, e.g. Message, Transport,
None).</faultstring></s:Fault></s:Body></s:Envelope>
--.
Metadata contains a reference that cannot be resolved:
'http://localhost:8000/HelloService/MyService'.
Content Type application/soap+xml; charset=utf-8 was not supported by
service http://localhost:8000/HelloService/MyService. The client and service
bindings may be mismatched.
The remote server returned an error: (415) Cannot process the message
because the content type 'application/soap+xml; charset=utf-8' was not the
expected type 'text/xml; charset=utf-8'..
If the service is defined in the current solution, try building the solution
and adding the service reference again.


CODE

[ServiceContract]
public interface IDataService
{
[OperationContract]
DataSet GetEmployeeRecords();
[OperationContract]
int FindNoOfRecords();
}

public class Employee : IDataService
{
#region IDataService Members
public DataSet GetEmployeeRecords()
{
DataSet ds = new DataSet();
ds.ReadXml(@"D:\NewTry\WCFs\WCFServiceLibraryX\WCFServiceLibraryX\EmployeeXMLFile.xml");
return (ds);
}
#endregion
public int FindNoOfRecords()
{
DataSet ds = GetEmployeeRecords();
return (ds.Tables[0].Rows.Count);
}

}




static void Main(string[] args)
{


Uri baseAddress = new Uri("http://localhost:8000/HelloService");

using (ServiceHost serviceHost = new ServiceHost(typeof(Employee),
baseAddress))
{
serviceHost.AddServiceEndpoint(typeof(IDataService), new BasicHttpBinding(),
"MyService");
serviceHost.Open();
Console.WriteLine("Press <enter> to terminate service");
Console.ReadLine();
serviceHost.Close();
}