Can't Connect to My Network Printer Anymore: Brother 7065-DN

I bought my Macbook Pro in 2010 and never had a problem connecting to my home network printer until a few months ago. Ever since I upgraded from Snow Leopard to Mountain Lion 10.8.5 I can't see or access the network printer. My daughter, who bought her Macbook Pro at the beginning of the year, pre installed with Mountain Lion, has no issues seeing and printing to the printer. I tried reinstalling the driver from my disk and it wouldn't take. I tried downloading the Brother driver from Apple and the specific driver's and updates for my printer, nothing. When I am lucky enough to see it on the printer list, it won't print, saying that the printer cannot be located. I have tried (when it does see it, which is random and weird) using the IP address and then the driver from the list, I also tried using the post script general. I have tried adding the IP address of the printer in the printer set up, I have tried adding the MAC address, I've tried clicking it when it occasionally shows up under my work group. I tried installing it while it was connected directly to the laptop...Nothing....I've turned on printer sharing, file sharing, and anything else I can think of...I am at a loss!

The two Windows PC and the other Macbook in the house can connect via the network, no problem. I even tried to look at her settings to see what was different but I couldn't figure it out. What is really frustrating is that I am working on my degree and need to print regularly, so everyone else in the house has to stop what they are doing, open the file I sent them through e-mail, download it, and then print it. It irritates them and me!

I have a standard router n/b/g and a comcast modem. One desk top and three laptops connected to it. Internet access works fine. Printer is a Laser Jet all in one scanner/printer Brother 7065-DN. I have downloaded all the updated drivers from Apple and Brother. Someone please help!! I am going crazy and wasting a lot of time messing with this that could be better spent on my homework!! Like I said, it worked fine until the upgrade!!