I seem to have solved the client/server network problems but he printing still doesn't work. Thanks for all yr suggestions. Two of them were very helpful. As far as I can deduce the problem IS the printer driver. Tho Canon makes good USB drivers for the i560 for both platforms, almost none of their USB printers have drivers that allow them to be used over a IP network. And further they've written them in such a way that they can't be easily modified to do the job. Apparently I need a CUPS driver to make this work. I've not been able to find one that is specific to the i560, tho many others are available at SourceForge.org. If one written for another inkjet printer would work I don't know how I'd ever find it except for trial and error. So at this point I guess I wait till a driver appears or my next printer investment. Till then I guess we continue with moving the USB connection whenever we want to print with one of the computers. <SIGH> It's a pain. John