Hi, I'm Robert and I'll be helping you with your computer question.
the problem is that they probably gave you a new router.
the printer was connected to the old router and is not yet connected to the new one.
You have to go through the original setup the same way that you did when you installed it the first time
with that printer it means running the install program
putting the usb cable on when asked to
then removing it when asked to.
as on this page
i can remote in to help you if you are willing to pay a little bit extra