#5 imprint gpg problems

[David Blaine]

Since I don't have an extensive background in gpg, I'm
not sure how to resolve this (and whether you can
help):

# ./install_printer_drivers.pl "HP LaserJet 5si"
Warn: Trying to install a newer public key.
Error: Verifying signature for file
'hp_laserjet_5si-1.01.tar.gz'. gpg ended with an exit
code of 65280.

Error: Verifying signature for file
'hp_laserjet_5si-1.01.tar.gz'. gpg ended with an exit
code of 65280.