Dunno, it may be due to your remaster. What do you get when you run /etc/init.d/autofs status? It seems to work OK using a PMI ("poor man's install") of stock Knoppix 3.6.

Here's what /etc/mtab looks like on my PMI:

Code:
/dev/root / ext2 rw 0 0
/dev/hda5 /cdrom vfat ro,nodiratime,fmask=0022,dmask=0022,codepage=default,iocharset=default 0 0
/dev/cloop /KNOPPIX iso9660 ro 0 0
/ramdisk /ramdisk tmpfs rw,size=91988k 0 0
/proc/bus/usb /proc/bus/usb usbdevfs rw,devmode=0666 0 0
/dev/hdb2 /mnt/hdb2 ext3 rw,nosuid,nodev 0 0
/mnt/hdb2/knoppix.img /home/knoppix ext2 rw,loop=/dev/loop0 0 0
automount(pid818) /mnt/auto autofs rw,fd=4,pgrp=818,minproto=2,maxproto=4 0 0
Line 2 indicates the partition the cloop file's on (hda5, FAT32). Line 7 is persistent home (hdb2/knoppix.img). And line 8's the automounter.

See how hda5 is mounted read-only? I don't see how you can unmount it and mount it read-write while Knoppix is running. Two people have told me they've managed to somehow save files to the drive their PMI is running from, but this is why I still don't believe them.