it's maybe late since you posted this topic two years ago ... but still it may help someone else I was struggling for entire week to connect my MX922 printer wirelessly to my Router, it was working just fine from the day i bought it until the last ...
@mosemomHave you tried to reinstall/update the drivers of your printer ? If no just do it, I had my problem fixed once I did it. Think also to install your printer the old way Manual over USB instead of network configuration. Wish you good luck.