Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
OK, Ben. This may be simple and have a good outcome. Or it may be a bit less simple, and turn out ... rather poorly.
First, please just make a test photocopy of one page, on your D1100. Does that work OK?
Second, please tell me how the D1100 is hooked up to your computer - through a network ? or through a direct USB cable connection ?