| I had the same problem a few times, although not with that many strips. I got tired of it and did some trcik that should work for you as well; you may however want to invite your electronics geek friend if you are not one yourself:
-) ensure a ESD- (electrostatic discharge) free working environment, otherwise the meter might come out of this destroyed. the minimum setup should be a somewhat-conductive desktop (metal is best, wood or paper might do, vinyl and the like is deadly) and make sure the meter and yoursel and the tools are all touching that same conductive surface
-) remove battery and code chip
-) remove screw that is hidden behind the label on the back
-) carefully pry open the housing by inserting a small screw driver not too deep along the side line of the housing
-) remove printed circuit board from housing by carefully disengaging the four small metall brackets around the board and pulling out the board vertically
-) short circuit the small battery soldered in on the back side of the board with a small screw driver; short circuit should hold for about one second, not much longer (would kill the battery), and not much shorter (doen't give the desired effect)
-) assemble in reverse order
-) when you now swicth on, the meter should show the manufacturing date (sometime 2008 in my case) rather than the real date that was there before the procedure. Leave the date where it is.
-) the meter will now accept your expired strips without complaints.
- be careful the strips don't get too old, they might give you wrong results!!!!  | 
