Sending Photo from MP to C1

I must be doing something wrong for when I right click on a photo in MP and choose to send it to C1, it asks me to set up a session. When that is done, I get the C1 window, but no photos. The only way to get photos to show up is to go into the files and choose the same photos as I have chosen from MP. What is the secret to choosing a photo in MP and sending it to C1? I have watched the videos, and have set up both programs to use C1 as the main RAW editor. I can go in to Photo Shop just fine, but not C1.

Any suggestions?

Sue