Unable to start XEN

hi,
i have installed xen on ubuntu 8.04 and is working fine.
Whenever I'm booting into xen kernel and trying to start xen by typing XEND, i 'm getting the following error,

ERROR Internal error: Could not obtain handle on privileged command interface (2 = No such file or directory)
Traceback (most recent call last):
File "/usr/sbin/xend", line 44, in <module>
from xen.xend.server import SrvDaemon
File "/usr/lib/python2.5/site-packages/xen/xend/server/SrvDaemon.py", line 26, in <module>
import relocate
File "/usr/lib/python2.5/site-packages/xen/xend/server/relocate.py", line 28, in <module>
from xen.xend import XendDomain
File "/usr/lib/python2.5/site-packages/xen/xend/XendDomain.py", line 35, in <module>
from xen.xend import XendOptions, XendCheckpoint, XendDomainInfo
File "/usr/lib/python2.5/site-packages/xen/xend/XendCheckpoint.py", line 20, in <module>
from xen.xend import balloon, sxp, image
File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 44, in <module>
xc = xen.lowlevel.xc.xc()
xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on privileged command interface (2 = No such file or directory)')

Any body have any idea, how to solve this....


Thanq.......

 

How did you install Xen?
What's the output of

Code:

uname -a

?