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Lets start by going to your start menu, devices and printers.
Then right click and remove / uninstall every copy of your Canon Pixma pro 9000 printer.. Once all copies are uninstalled.
Close the devices and printer menu.. Then, lets download the 2.23 Printer driver from this page for windows 7 64 bit.
Once you have downloaded the 2.23 driver, make sure you run it and install it.. As this will reinstall your printer.
Once its installed, have it print the test page.. Does the printers own test page come out blank?
If the test page is working, try a document next..
let me know if this works, or if you get stuck at any point during the process. Thank you~
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