[PLUG] apt gpg problems

[Dirk Ouellette]

What exactly do I need to do to correct this?
Thanks

162 upgraded, 1 newly installed, 0 removed and 5 not upgraded.
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Checking GPG signatures...  ###########################################
[100%]
E: Unknown
signature /var/cache/apt/archives/kernel#2.6.11-0.3.rdt.rhfc3.ccrma_2.6.11-0.3.rdt.rhfc3.ccrma_i686.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#68d9802a)
E: Error(s) while checking package signatures:
0 unsigned package(s)
1 package(s) with unknown signatures
0 package(s) with illegal/corrupted signatures
E: Handler silently failed
[root at localhost DOWNLOADS]# rpm --import public.gpg.key
error: public.gpg.key: import read failed.