i have wrote:
dsa = Signature.getInstance("SHA/DSA");
signer = new SystemSigner("Administrator");
priv = signer.getPrivateKey();
dsa.initSign(priv);

It is known, i have a "Administrator" certificate
An "java.security.InvalidKeyException" happened.(DSA private key is null)

Please , tell me if you know , or mail me: [email protected]
Thanks