HELP : Can't load JDBC driver !

Hi,

Yes, I cant't load the JDBC driver !!!
There must be a silly set-up somewhere, but I
can't find it.

Here some informations that might help you :
1. Mandake 7.2
2. the postmaster is run from init script as follow :
       su -l postgres -c "/usr/bin/pg_ctl  -D $PGDATA -o '-i' -p
/usr/bin/postmaster start > /dev/null 2>&1"
3. the very last line of my /var/lib/pgsql/data/pg_hba.conf :
local        all                                           trust
host         all         127.0.0.1     255.255.255.255     trust
4. the JDBC driver is in the CLASSPATH :
 ...;/home/nusa/Java/PostgreSQL/jdbc7.0-1.2.jar
5. in my java file :

   import java.sql.*; // no import org.postgresql.* !
   ...
   try {
       Clss.forName("org.postgresql.Driver");
   }
   catch (ClassNotFoundException e) {}
   ...

Can someone help me ?

Thanks,
nusa.