Digital ID keeps prompting to access Protected Storage when sending message

[AJ]

I'm testing a Verisign Digital ID to "sign" my email. I must have chosen an
option when installing the Private Key (or something) to put it in Protected
Storage.

Now whenever I attempt to send an email I get a notice (popup) saying
"Application is attempting to access item from Protected Storage" (or
similar text).

Is there a way to tell Windows (2k or XP) that Outlook 2002 is "trusted" to
use this key when sending email?

Otherwise, is there a way to change how my Private Key is stored so that it
(hopefully) still secure, but Outlook doesn't continue to bother me with
this prompt EVERY TIME I send an email???

Thanks in advance,
AJ