iomega parallel zip drive

Ok i had this working fine under my 2.2 distrobution kernel(debian) with modprobe ppa. i Decided to compile a 2.4 kernel and i an trying to get it to work correctly. Right now i have scsi support enabled, scsi disk support enabled, the ppa module compiled in as a module, and parallel printing enabled as a module(as per the zip drive mini-hwoto). When i modprobe ppa it says that /dev/sda4 is not a valid block device. I have kernel compiled about 6 times tonight and i would really like next time to be last time, at least for tonight :) andone know what might be wrong?