Builder, Forms and OpenGL problem

I''m really stumped by this one guys/gals. Hope someone can help. Using Builder 4, I made a form that renders an OpenGL scene. When the form is in it''s own window, it works great. BUT, when I went to use it in another form by setting its Parent property to another form, the OpenGL form shows up in the Parent form but the OpenGL scene doesn''t show at all. The OpenGL code is running but nothing shows up in the window. What am I missing? Thanks, Randy