You need to be using the 2.6.28.10-cssu1 kernel for the binary in my previous post:
If you're not using it already, I think installing the `kernel-cssu-flasher` package should do it .. though I don't think you're meant to do this if you're already using u-boot. Someone else might be able to help here, since my own boot setup is fairly unconventional.

I'd then suggest moving the original module, located at `/lib/modules/2.6.28.10-cssu1/omap_hsmmc.ko` somewhere before replacing it with the one in my earlier post.

I wouldn't really suggest this if you don't understand what's happening, unless the sensor actually doesn't work (so you see the "cover is open" message in dmesg, mentioned by the first poster).