I have 2 Canon printers - one does not require users to enter ID and PIN. Works fine for everyone in the building - wireless and cabled users. The second one does require ID and PIN. Wireless users sometimes get "Could not verify the Department ID and PIN specified in Department ID Management. Printing will be canceled. Refer to the on-line help." Other times it will work. I have checked firewall settings and tried numerous different devices and ID's. Where do I look next?