GPG Keys and KMail (9.3 Pro)

Hello all. I recently finished my new 9.3 install -- a clean install -- and have only found one problem so far. I use GnuPG to sign my mails; however, I am unable to select my key in kmail's <Edit Identity> <Cryptography> OpenGPG dialogs. Has anyone figured this out? Is there another way to tell kmail which key to use for signing? As for my impressions of 9.3 Pro thus far... I really like 9.3. Although I'm not using it in a production environment, I have had a lot less trouble with it than I did when I first installed 9.2 Pro. TIA for any/all tips. -- Christopher Shanahan