Hi and Welcome. My Name is ***** ***** I look forward to assisting you today with your question.
Sounds like it is trying to use old wireless configuration. First we can reset your printing system and see if it works or not.
After resetting,your Printer will disappear from the list. Then disconnect the printer and connect it to different USB port of your Mac. It will be added automatically. If not, then click the + button in there (in left corner) and add it back.
If that didn't work, then download and install the Scan and driver from here --> http://gdlp01.c-wss.com/gds/6/0100007316/05/Mac_ScanGear_V281_00.dmg
Also go to Applications folder and open Image Capture. Try to scan with it as well.
Please let me know if that didn't work, so we can continue troubleshooting.