SSL & client config.

Hi,
I am trying to setup a client JDBC with SSL, use the guide  http://jdbc.
postgresql.org/documentation/80/ssl-client.html

make the server certificate
available to Java

openssl x509 -in server.crt -out server.crt.der -outform
der

get  server.crt.der


follow

keytool -keystore
$JAVA_HOME/lib/security/cacerts -alias postgresql -import -file server.crt.der


error : Keystore was tampered with, or password was incorrect ?

But the
password is correct!!!!!!!!

I'm confused help-me please.



Ps:  Postgresql
from shell with SSL works.