Hello Kimzi,
I have the same problem. I followed the steps below, but when I am opening the stored file manager 3, I always get the message "unable to connect to the specified scanner". I am using win 7 32 Bit, can print without problems, but also when I select "Networkscan" at the printer, there is "not possible" displayed.
One more information, I can access the printer settings threw firefox and the green light at the printers RJ45 is blinking continuesly.
Would be great if I could get some help.