[mew-int 2851] s/mime digital signatures

Hi - I am having trouble getting the S/MIME digital signature
feature to work in Mew running in Emacs on ubuntu 9.10 (64-bit).

I am running Mew version 6.3 on the Emacs version below:
GNU Emacs 23.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.18.3) of
2009-11-10 on crested, modified by Debian

I followed the instructions at to configure S/MIME:
http://www.mew.org/en/feature/smime.html

However, when I go to sign the message, using the
"mew-smime-sign-message" command, I get the following in the *Messages*
buffer:
S/MIME signing...done
No specific reason given for [email protected]

If I use the mew-pgp-sign-message, I get the following errors in
*Messages*:
PGP signing...done
No secret keyring or no your secret key

I generated the certs.pem file using gpgsm, as described in the URL
above.  I am using gpgsm version 2 and gnupg version 2.

I have never used Mew before, but am wondering if I need to use the
older version Mew 6.1 to get this to work, as stated in the link below:
http://www.mew.org/en/feature/

On the other hand, it seems like gnupg is simply not recognizing my
public key.  I get the dirmngr errors below when executing the below command
% gpgsm --import certs.pem
...
dirmngr[26269]: command LOOKUP failed: Not found
gpgsm: dirmngr cache-only key lookup failed: Not found
gpgsm: issuer certificate {67AA7ACFF40AA6B972B58AA0D29DF210C343ED29} not
found using authorityKeyIdentifier
...

I am using version 1.0.2-1 of dirmngr.

Any help would be greatly appreciated.

Thanks!
Jeff