You have two choices - add a field to the image control or use the photo control.
If you keep your version where you add a path to the photo file field, and add that field name to the image control, click Refresh to see the image.
If you use the contact photo field, you add it using the Picture menu and it shows up in Outlook photo control. Honestly, unless you need to keep a record of the image path, I would use the picture command and the outlook photo control. I don't know of a way to use the picture (OlkContactPhoto1) as the field in the image control (replacing textbox10).