Cannot revoke signature

[Christophe Labouisse]

I'm trying to revoke a signature with GnuPG 1.2.0 but I didn't
succed.

First I create a revokation certificat using :

$ gpg --output revokation.asc --gen-rev KEYID

A revokation certificat is created but when I tried to import it I
always get the following error :

$ gpg --import revokation.asc 
gpg: key KEYID: invalid revocation certificate: general error - rejected
gpg: error reading `revokation.asc': general error
gpg: import from `revokation.asc' failed: general error
gpg: Total number processed: 0

What I'm I doing wrong ?