Kmail + wallet in KDE4

I’ve just started using OpenSUSE 11.0, and it’s generally very good. There is an annoying problem with kmail and the KDE wallet. Every time I try and send mail, it keeps asking for the wallet password, then it reprompts me for the SMTP server’s password. I type it in, and tell the system to remember it, but it never seems to stick.

Last time I typed it in wrong, and of course it does remember that. I went into Kmail to fix the password, but how can I make it stick so I don’t have to reenter the password for every new kmail session? Should I not use the wallet for this?