New Lucid install and gtk missing error

[justanotherhandle]

Heya! Just installed Lucid on an older desktop and when trying to use the update-manager I'm getting a gtk module missing error:


$ sudo update-manager
Traceback (most recent call last):
File "/usr/bin/update-manager", line 29, in <module>
import gtk
ImportError: No module named gtk


Any idea how to fix this?

Thanks!