Use other hash than SHA-1

[Simon Ruderich]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I would like to use a different hash than SHA-1. I tried setting
personal-digest-preferences SHA256 in my gpg.conf but it didn't
work. What hash can I use with my key (default DSA/Elgamel key)
and how?

Thanks for your help,
Simon
- -- 
+ privacy is necessary
+ using http://gnupg.org
+ public key id: 0x6115F804EFB33229
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)

iEYEARECAAYFAkn8H6kACgkQYRX4BO+zMili5wCeIYIIOru6ZEq+0F+9vzVqE1mo
axcAnRh+5fFnzzXWpvZvWVLO5dYf+j5E
=wUa4
-----END PGP SIGNATURE-----