10.2A Method is not available. Why?

Hi,

I'm trying to implement a diagram from the Open Diagram project on codeplex: http://opendiagram.codeplex.com/

There is a class called "Model". The signature shown in VS.NET is this:

public class Shapes : Open.Diagramming.Collections.Elements<Shape>
    Member von Open.Diagramming

The collection Elements has the method "Add":

public override void Add(string key, Open.Diagramming.Shape value)
    Member von Open.Diagramming.Collections.Elements<Shape>

This method (and any other methods with the Collection "Elements") are not available in Progress, if I add the assemblys to my project.

Anything else is working.

I tried to add the same assembly to a new C# project, and the method Model.Shapes.Add() is available.

What's the problem here?

Thanks in advance!

PS. Here is my code (inspired by the .NET example )

define variable model as Open.Diagramming.Model.
model = diagram1:Model.
       
define variable tbl as Open.Diagramming.Table.
tbl = new Open.Diagramming.Table().
       
tbl:Location = new System.Drawing.PointF(100,100).

model:Shapes:Add(tbl). /* This raises an error */