ECosy 131 setup IP Address

I have created a Talk2M account. I have port 4(the WAN port) connected to my Cable Modem. LAN port 1 running to my laptop. In EBuddy, I changed the IP address of the ECosy from the default(10.0.0.53) to one that is on my subnet but not being using. After watching the second video, I attempted to change that address too: 192.168.0.20. However when I open that address in the browser I see an a “Internet Connection error” with the Internet Connection and Talk2M Connection buttons in red.
If I use the factory default address of 10.0.0.53 I don’t get that error, but the IP addresses assigned by my cable modem router start at 192.168.0.2
Can you tell me what I need to do in order to set this up correctly. I watched all the videos. Seems I’m missing something
Thanks for your time

Have you contacted the repair service?

Why didn't you initially contact the repair service with this problem? There is a possibility that you have been sold a weak access point. You may have managed to fix the problem now, but it may appear again in the future. I just had the same problem. A month after I bought a new router, it wrote to me "connected without Internet access" when I connected to the Internet. It always pissed me off. When guests came to me, they sat on social networks using the mobile Internet. It was extremely unpleasant for me, and I decided to deal with this WiFi. I contacted the service, which provided all the necessary information about WiFi, and they resolved my problem.