Image on an MDI form

Question

OK, I'm trying to create a background image on an MDI parent form. Here are my problems: 1) If I use a PictureBox, whenever I open a child form, the PictureBox stays in front of the child instead of behind it. 2) I have tried using the Graphics.DrawImage with no avail (e.g. the image doesn't appear). I would like to have an image that appears on an MDI parent form and stays behind any children forms that are opened. What am I doing wrong?? Thanks in advance.