cannot mount jffs1 image from loop

[Gad Hayisraeli]

i use mediaEngine, a SA1110 board.
if i try to mount jffs1 file system that i made on 1 file (with mkfs.jffs),
it says:
[root at IMC-2 /root]$mount -t jffs -o loop jffs1 /mnt (jffs1 is the filename)
JFFS: Trying to mount a non-mtd device.
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
       or too many mounted file systems

in the 2.4.17 kernel, i enabled all the mtd options, and also ram mtd block
support.
i have /dev/loop 0-2, and also jffs+jffs2 support on the kernel.

2. i saw in the prevous posts that jffs2 do not support 'looping' (mounting
from file). is that so untill now ?

3. is there any other read/write file system that i can put on flash chip
like in nanoengine/assabet ?

thanks

Gad