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It appears you had the wrong driver installed Sue, and whilst it was working, when it went to reinsitalize the printer, it faulted.
Its not problem, just download and install the Yosemite drivers which you can get from my link belowClick me to work
Once done, it should again function
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Let me know the results please