JDBC driver does not accept good md5 passwords

I'm using very often OpenOffice to administrate databases (It has
options, wchich are not present in pgadmin3).
If I use JDBC connection and server don't requiers md5 passwords, I can
edit and administrate the databases/tables via OpenOffice and JDBC. I
can only read the tables. When server requiers md5 passwords I can't. Of
course, I want to have possibility to edit tables via OpenOffice :-).
Has anybody any idea, how to do this ?
I'm using "postgresql-8.2-504.jdbc3.jar" and "jre1.5.0_06". Server 8.0.7
compiled/using on FC3 or binary installation 8.0.6 on Win2003. I've
tried older *.jar version with this same result. OpenOffice 2.0.3 or 1.4.1.
Greetings
Adam