Did you uninstall FN and then re-install FN as per the prior post instructions?If after you re-install FN and get the latest software update, does the problem still exist?
If so, does the problem occur only after using the fax/scan capabilities? Or does FN work prior to using one of those capabilities and then stop working after you use the fax/scan?
Are you able to print to your Cannon using any other application other than FN reports? (e.g., Word, Excel)
What version of FN are you using? (FN 8.1.1?, FN 8.0.x?, FN 7.5.x?)
What Windows platform are you using? (Windows 98, NT, 2000, XP?)
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