MBP with OS X 10.8 not finding printer on wired network

Question

I'm having a problem with a one year old MBP, in a small office environment full of PCs, no longer being able to find a specific printer on the ethernet network.  The PCs are having no problems.  This is a small office with 6 PCs and one Mac.  All are networked via ethernet to print to a Xerox ColorQube 9303 and a Xerox WorkCenter 7545 printer.
The MBP had been using both printers for several months and was using OS X 10.7 during that time.  About a month ago the MBP lost connection to the Xerox WC 7545 printer.  I'm not sure but it may have occurred along the same time as the MBP being upgraded to OS X 10.8.
This is what I've tried so far with no success, in this order;
Deleted and tried to re-install the printer in System Preferences but Xerox 7545 was not found.
Reset printing system,  and re-installed the Xerox ColorQube 9303.   The Xerox WC 7545 was not found.
Turned off printer, disconnected from network and AC power, waited a couple of minutes, reconnected to network and plugged back in and powered up.  Still not recognized in System Preferences.
Downloaded driver package from Xerox website, ran install package.  Installer instantly found Xerox ColorQube but did not find Xerox WC 7545.  Continued with installation and got "Installation Successfull" notice.  Tried installing printer in System Preferences and could not find printer.  Note that the Xerox website lists this driver as combatible with 10.6, 10.7, and 10.8.
Disconnected WC 7545 printer from network wall jack and connected directly to MBP and still could not be found in System Preferences.
Printed out status sheet from printer and used the IP address in Safari URL and was connected to printer.
Went to System Preferences and added printer manually using the IP address and successfully connected to the printer.
I'm able to print now, however, I'm using Apple's generic postscript printer.  This is not the way it should work.  I want to install the Xerox WC 7545 driver in System Preferences like it's supposed to and use the printer setup like it's supposed to work...like the PCs, dag-nab-it.
Why is the MBP not able to find this printer on the network on it's own, especially since it used to work this way?  Can anyone tell me what I'm over looking, or at least give me suggestions on trying something else?
Thank you

Answer 1

There is no scanning support for this model.
MF ScanGear does not support the MF42xx series. And CanoScan Toolbox is just for the inkjet-based models and stand-alone scanners.
Also, there is no ICA driver for this model so you cannot use Image Capture.
And resetting the printing system will not resolve your issue.