Problem with LUKS and custom Kernel (Debian Etch)

[mudfanatic]

I'm running an Etch system with an encrypted hard drive. I have a problem after recompiling my kernel: when booting, I get an error after entering my LUKS passphrase - it says it can't identify the filesystem on my encrypted partition. Does anyone know if I have to compile some option into the kernel for the LVM to identify encrypted partitions properly? The vanilla debian kernel boots fine and I didn't touch any of the crypto settings for this new kernel. (LVM is also enabled since I disabled it by accident then found out I shouldn't have )