Documents go to Que but do not print...

I have an iMac running Mac OS 10, version 10.5.6 It is about 3 months old. I have it hard wired to an ADSL Router and my HP 2510 All-in-One Printer is hard wired into the same Router.
My Mac lists this printer in "Applications: HP all-in-one chooser."
As soon as I click on my printer a window comes up that says "the HP all-in-one chooser quit unexpectedly."
I have tried reinstalling the driver software from my disk and from the HP site.
When I try to print anything, it will go to the printer queue and sit on the list there but it will not print it. Any guesses as to what I am doing wrong?
Beside each document listed in the que it says "stopped", when I try to reprint a document it will open a new window that says "Operation could not be completed, client error not possible." What the hell does that mean?
Oh yes, When I open my "Printers" folder I have this printer listed three times, could this be the conflict? How do I get rid of 'em?
Any help will be greatly appreciated.
Thanks, Jim.

 

Wow, overwhelming...

Thanks for all the help.