CME : Validating package signature ... error

I am trying to install a license for my cue module. I am getting the following
error.
Any help with this ?
 
WARNING:: This command will install the
necessary software to
WARNING:: complete a clean install. It is recommended
that a backup be done
WARNING:: before installing software.
Would you like
to continue? [n] y
Downloading cue-vm-license_100mbx_ccm_7.0.6.pkg
Bytes
downloaded : 5319

Package signature validation failed for pkg
cue-vm-license_100mbx_ccm_7.0.6.pkg
[15252 refs]
admin#
 
SD

Blogs and organic groups at http://www.ccie.net
Received on Tue Jul 17 2012 - 07:49:55 ART