I have a kernel (2.4.22 Benh) that works fine except for decrypting.Are you using the kernel sources from Debian, or Ben's tree itself?well i suppose its debian sources, but havent downloaded it myself. just mirrored the whole system from a friend with same hardware. as i understood cryptopatch doesnt work with that version.
Well, the crypto patch doesn't work with 2.4.22 because it is already *in* this Kernel ;-).
Have a look in the .config file, at the end you will see several lines CONFIG_CRYPTO[...]. If they aren't there reconfigure your kernel with cryptographic support.
-Thomas