secret key not available

[Yard, John]

I exported a key that was needed by a bank
from a pgp 6.5.8 secret keyring and inported into
gpg using -import .

Now when I sign using that key I get
'signing failed: secret key not available'.

In gpg I see the key when I do a gpg -list-keys,
But don't see it when I do a gpg -list-secret-keys.

When I cat the exported key asc block It describes itself
as a public key.

Any clues as to what I need to do. I see this key on my pgp
Public and secret keyrings....

JYard
UCLA
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