Business Rule Engine… Plz help

Thanks, Stephan.

I have following rule
1.If Employee.Emp:/Empname = Northwind.Customer.CustomerName
Action Employee.Emp:/EmpID = 100

2. If Not Employee.Emp:/Empname = Northwind.Customer.CustomerName
Action Employee.Emp:/EmpID = 200

Initially I have called expression shape in orchestration where I have written following code

SqlConnectivity = new System.Data.SqlClient.SqlConnection(\”Persist Security Info=False;Integrated Security=SSPI;database=Northwind;server=(local)\”);
SqlConnectivity.Open();
SqlTransaction = SqlConnectivity.BeginTransaction();
DatabaseConnectivity = new Microsoft.RuleEngine.DataConnection( \”Northwind\”,\”Customer\”, SqlConnectivity, SqlTransaction );

Then I used Call rule shape where I passed two parameters: message variable and Database connectivity (of type Microsoft.RuleEngine.DataConnection)

And when I tested again nothing happens.

Then I found out that for database connectivity we need Factretriever.

So I created C# class file.

My code is as follows

namespace myFactRetriever
{
public class myFactRetriever : IFactRetriever
{
public object UpdateFacts(RuleSetInfo rulesetInfo, Microsoft.RuleEngine.RuleEngine engine, object factsHandleIn)
{
object factsHandleOut;

// The following logic asserts the required DB rows only once and always uses the the same values (cached) during the first retrieval in subsequent execution cycles
if (factsHandleIn == null)
{

SqlConnection SqlConnectivity = new SqlConnection(\”Initial Catalog=Northwind;Data Source=(local);Integrated Security=SSPI;\”);
DataConnection DatabaseConnectivity = new DataConnection(\”Northwind\”, \”Customer\”, SqlConnectivity);
engine.Assert(DatabaseConnectivity);
factsHandleOut = DatabaseConnectivity;
}

else
{
factsHandleOut = factsHandleIn;
}
return factsHandleOut;
}

}
}

I built and GACed.
Now I configured policy version property for factretriever. But when I test the policy I get following error

\”Method or Operation is not implemented\”
This error I am getting even if I run Orchestration also…

Now where I have gone wrong?
1.Do I need to have any refernce of factretriver in Biztalk project? But then even policy test itself is failing..
2. Do I need to pass any parameter?
3.how can I make use of this factretriever in rule composer?
4. Should I use the database connectivity expression in expression shape in Orchestration ?

It would be great help if you guide me

Thank you