Go to your local area network settings on the computer and find the properties. See what your IP address is something like 192.168.2.100 or it may be different but that doesn't matter, what you need is to know what the first 3 sets of numbers are. in this case 192.168.2
If you changed routers the first 3 sets of numbers in the IP maybe different than they were before. You will need to change the IP in the settings on the printer to match the first 3 sets of numbers and then set a different number in the 4th spot.
Then go into your RIP and set the IP for your printer connection to match what you entered into the printer.