Problems Creating TVF Function

I had succesfully created a CLR function which was fully operational on the development server. Today the powers that be decided to do a full restore from the Production server because the wanted the most recent data on the server. Since our code has not been deployed to production I went through the exercise of redeploying everything to the server and all goes well until I try to create the function:





Code Snippet
CREATE FUNCTION f_GetGroupMembership(@providerKey nvarchar(200), @connection nvarchar(1000))
RETURNS TABLE (groupID uniqueidentifier, groupName nvarchar(100), groupType nvarchar(25))
AS
EXTERNAL NAME NavigatorSecurity.groups.GetGroupsForUser






This returns an error:


Msg 10305, Level 16, State 1, Procedure f_GetGroupMembership, Line 1

The Init method for a CLR table-valued function must be annotated with SqlFunctionAttribute.

Now remember this CLR was working correctly previous to the restore from backup. But just in case I got a case of dumb*** I checked my clr code anyhow here it is:




Code Snippet
using System;
using System.Data;
using System.Data.Sql;
using System.Data.SqlTypes;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
using System.DirectoryServices;
using System.Collections;
public class GroupMembership
{

[SqlFunctionAttribute(FillRowMethodName = "FillGroupRow")]
public static IEnumerable GetGroupsForUser(String ProviderKey, String Connection)
{
return groups.GetGroupsForUser(ProviderKey, Connection);
}

public static void FillGroupRow(Object obj, out SqlGuid guid, out SqlString name, out SqlString type)
{
//cast the enumerator passed in
group grp = (group)obj;
//create output parameters
guid = new SqlGuid(grp.guid);
name = new SqlString(grp.Name);
type = new SqlString(grp.applicationData);
}
}






Can anyone tell me why this is happening? How can I overcome this problem?

Help will be highly appreciated.