Custom Connection Manager Doesn't Show Up In VS?

I've created a very simple custom connection manager, and I followed the deployment instructions at http://msdn2.microsoft.com/en-us/library/ms345276.aspx.  Basically, that was just copying the assembly to %programfiles%Microsoft SQL Server90DTSConnections, and then registering the asssembly in the gac.

However, when I open VS, right-click on the connection manager pane, and then choose new connection, my custom manager does not appear.  What am I missing?

Here is the class:

using System;

using System.Collections.Generic;

using System.Text;

using Microsoft.SqlServer.Dts.Runtime;

using System.Data.SqlClient;

using System.Xml;

namespace MyCoolCompany

{

[DtsConnection(DisplayName="Sharepoint Connection Manager",

Description="Connect to Sharepoint lists",

ConnectionType="Sharepoint",

ConnectionContact="My Cool Company",

UITypeName="SPDataFlowComponent, MyCoolCompany.SharepointConnectionManagerUI")]

class SharepointConnectionManager: ConnectionManagerBase

{

}

}