The Cannell sight can balk if you don't have a 5Mbps line or greater.
Here is the pic. Right click and save to your desktop. If not clear PM me your e-mail and I will send. The pic is "clear" on my end before posting here.
Focus on the wires between the switches first. Hot is red/blu and you know you have power so checking upstream of first switch is not where I would go first.
Edit - It is compressed a lot when posting to forum. I can e-mail if you wish.