KMail and PGP

[Daniel D Jones <ddjones@riddlemaster.org>]

I have PGP v 2.6.3 installed on my system (Debian unstable.)  I've generated 
keys and can encrypt or sign a document from the command line without error.  
I'd like KMail to add a PGP sig to my posts.  I have the option selected 
under "Composer" and have my PGP identity entered under "Identity."  Under 
security, if I select either "PGP 2.x" or "Automatically detect", the 
selection will not stick.  That is, if I close the dialog box, then reopen, 
the setting has reverted to "Don't use encryption"  When I compose a message, 
the buttons for either encrypting or signing a message are greyed out and 
unusable.

I've been through the KMail help file and can find nothing else I need to do 
to make this work.  Any clues on what I'm missing?

Thanks in advance,

Dan