Good day to you all - I'm completely flumoxed!!!

legacy remote system which does firewall, dmz, routing etc. guy who built it is long gone and his notes don't help. system has been very efficiently running Xen on gentoo for 5 years. power failure caused ungraceful shutdown - this has happened a couple of times before but no problems then. now, restarts and syslog looks good to me for host kernel - after all I can remote login and su to root. xenblkd running (sleeping) but nothing else to do with xen in sight.

here is data that I hope might help someone enlighten me with the nub of the problem:

vmlinuz-2.6.11.
xen-2.0.6

tried 'xend start' from root and got:

Traceback (most recent call last):
File "/usr/sbin/xend", line 27, in ?
from xen.xend.server import SrvDaemon
File "/usr/lib/python/xen/xend/server/SrvDaemon.py", line 35, in ?
from xen.xend.server import SrvServer
File "/usr/lib/python/xen/xend/server/SrvServer.py", line 28, in ?
from twisted.web import server, static
ImportError: No module named web


now, I am pretty certain no updates, no software changes of any kind, certainly not in last couple of years.

ImportError: No module named web - where'd it go? or is this masking some other issue?

very grateful for any help

cheers

Richard