exception running example.basic

I have built the postgress jdbc interfaces. When I try to run the example as
follows:

CLASSPATH=.:./postgresql.jar:$JDKTOP/lib/classes.zip

java -Djdbc.drivers=postgresql.Driver example.basic
jdbc:postgresql://localhost
/a_database a_userid a_password

I get the following error.

PostgreSQL basic test v6.3 rev 1

Connecting to Database URL = jdbc:postgresql://localhost/a_database
Unknown object of type:java.lang.ClassNotFoundException
Exception caught.
java.lang.IllegalArgumentException: Unknown argument
java.lang.IllegalArgumentException: Unknown argument
at java.text.MessageFormat.format(MessageFormat.java)
at java.text.MessageFormat.format(MessageFormat.java)
at java.text.MessageFormat.format(MessageFormat.java)
at postgresql.util.PSQLException.translate(PSQLException.java:83)
at postgresql.util.PSQLException.<init>(PSQLException.java:45)
at postgresql.Driver.connect(Driver.java:106)
at java.sql.DriverManager.getConnection(DriverManager.java:91)
at java.sql.DriverManager.getConnection(DriverManager.java:134)
at example.basic.<init>(basic.java:32)
at example.basic.main(basic.java:171)

Regards,
Floyd Shackelford
4 Peaks Technology Group, Inc.
http://www.4peakstech.com/
office: +1.888.398.4405
fax: +1.916.404.7125