Mi name is Israel and I'm writing you from San Juan PR. My pleasure to meet you!
Like you, I change my ISP (or equipments) and as a result I was equipped with a wireless router (CTR500) and a USB for internet connection. I do know that this alone work in my iMac, but I'm not able to make the internet connection with my Time Capsule and my Apple TV.
To my logic, I connect the ethernet cable in the ethernet port that the CTR has (between the power cord and the USB) and the the port with the many circles. Still not able to connect with iMac, or Apple TV, or anything.
I believe that must of all other problems and errors has occurred to you as well, so, can you help me? Hope you can help...