Could not find any loop device when try to mount a iso file

when I try to mount a ISO file (CD Image) use the command and I got some error message:

 mount -t iso9660 -o loop 1.iso  /mnt/1

Could not find any loop device. Maybe this kernel does not know about the loop device? (If so, recompile or `modprobe loop’.)

modprobe loop

FATAL: Module loop not found.

does anyone has idea how to resolve it? do I really need to recompile the kernel?

any help will be great appreciated.

Mods to the My Book Live are not supported by WD, but maybe some of the other users can help.