Hooked up wireless router. Now wired printer doesn't work

That’s it in a nutshell.

I have a Dell PC running Windows XP, Roadrunner cable modem. Dell printer. Printer always worked.

Just hooked up a Linksys wireless router for my daughter’s new laptop. Works. Everything works except now, when I try to print, my computer says

I’ve done this, still no luck.

Any thoughts?

Unfortunately, what you are asking is akin to saying “I painted my house and now the dryer doesn’t work”. Could you provide more information as to how the printer is connected to your computer? Did you try deleting the printer and re-adding it? Have you tried the printer on the new laptop to rule out it being an odd timed failure?