Problem w/ my Airport Extreme Base Station & Canon i250 Printer

Hi All...
Well, I'm at my wits end...before I call AppleCare, I thought I'd post on here to see if any of you had similar issues or problems with what I'm having, and maybe a resolution(?)...
First of all, I've been using this same setup for the past 1 1/2yrs, and never had a problem with it until lately.
I cannot print reliabily over wireless to the Canon, only through the Ethernet/LAN jack.
Here is my setup...
- Airport Extreme Base Station (w/ telephone jack) and Firmware 5.7
- Powerbook G4 12" w/ Mac OS X 10.4.5
- PC Notebook (HP Pavilion ZV6000) w/ Windows XP and Broadcom 802.11b/g/128 Pre-N
- Canon i250 Inkjet Printer (was originally a free printer..worked very well over the years)
Originally, everything was working very reliably and I never had problems... I'm "guessing" something has changed (firmware?) that has caused any print jobs sent from either the PC or Mac to pause half way through a page and hang the printer. The computer (usually the Mac) will say it is having difficulty "reaching the Canon i250".
I've one a Hard Reset on the AEBS and that has not fixed it. I've not tried Interference Robustness yet but am not sure it will work. I do not have any problems using Wireless otherwise--only with printing, and nothing has change in the setup since I first got the AEBS (except maybe firmware).
Does anyone have any suggestions or insight as to what exactly could be the problem?
Is this a bug in Firmware that I'm not able to find?
Thanks so much for your response(s).

Delete your printer using Printer Setup Utility and
add it back. Does the performance improve?
No it didn't... I deleted, re-installed twice and still nothing new...
However, if I'm printing directly from my tower (WinXP Tower) over LAN, it works fine...but does not work at all through wireless.
For a year or so, I've never had a problem and nothing has changed in this setup. I think the culprit might be the last AEBS firmware update.
I've troubleshot everything I can think of and still having issues printing...

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