just installed latest version from website ,got this error

~ $ ukmp
Traceback (most recent call last):
File "/usr/bin/ukmp", line 22, in <module>
import MediaCenter
File "/usr/bin/MediaCenter.py", line 88, in <module>
from PyAtom import *
File "/usr/bin/PyAtom.py", line 25, in <module>
from PIL import Image
ImportError: No module named PIL
~ $