I see that these were purchased in Dec 2011. It is possible that the chip on this cartridge can not be reset or has been static shorted.
We do sell replacements chips for these here: http://shopping.netsuite.com/s.nl/c.362672/sc.18/category.84880/.f
You can buy an entire set of spares if you want, but we suggest you pop out the batteries to conserve them. The battery is always in an on state - and trickle. Of course once they are installed the battery has a larger load.