On the control panel of the MX922 machine itself.
Go into settings, network /wlan setup.
And we want to select your wifi network. And then enter the password ***** then connect the printer.
Once you have done that successfully.. Lets move to your windows 7 computer.
Click start, click devices and printers, and now right click and remove any and all copies of your mx922.
Once removed.. Click add printer, add network printer.. And wait.
It should show your mx 922 listed with an ip address.. Click it and click next, and it should allow you to add the printer as a wireless printer.
then, you should be able to print once its added.
If you run into any issues, let me know.
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Senior Technician and Network Switching Systems Operator / Maintainer.