I note from the screen shot that you were printing from Safari. Can you print from a word document or a .pdf? To review the bidding, you've confirmed for B.V. that your printers are showing up in the printer utility (assume that you've removed the printers from your list and then re-added them), so your mac knows where they are and your page settings are fine, and the printers are directly connected to your computer by USB (my assumption)? or directly via ethernet? If you can print from other programs, that will at least narrow it a bit.
Aside to digress - nice homepage. I grew up (age 2.something to 10) in Phoenix in the 7200 cul de sac block of north 29th drive. Used to melt crayons in the driveway in the summer, watched the local Wallace and Ladmo TV show... .