Cannot set default printer on shared printer on wireless network

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Hi,

I have two Dell desktops that share printers on a wireless network.
Once I make both printers shareable on the network, I set the Epson
ML-1650 Printer as default for my computer and the Epson Stylus Photo
RX500 as default for the other computer. Then I try to print a Word
doc, and File->Print indicates the correct printer on each machine as
the default. I can also see the shared printers on the pulldown list.

However, when I open up some other doc to print, the default keeps
reverting back to the Epson Stylus Photo RX500 on my computer, but
interestingly (read frustratingly) the other computer keeps the RX500
as its default.

Other than a poltergeist, why would my computer keep resetting the
default printer to the other computer's printer?

Help, Scott

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