Connection To Oracle

Can someone help me decipher this error when attempting to create ChangeLog for an oracle database 11gR2 ? 

I can create and run JAVA programs against this database from this environment.  PLEASE HELP - frustrated…
-Bill

$ ./mygen-changelog.sh
Migration Failed: liquibase.database.DatabaseFactory.findCorrectDatabaseImplementation(Ljava/sql/Connection;)Lliquibase/database/Database;.  For more information, use the --logLevel flag) Nov 8, 2010 9:13:18 AM liquibase.commandline.Main main
SEVERE: liquibase.database.DatabaseFactory.findCorrectDatabaseImplementation(Ljava/sql/Connection;)Lliquibase/database/Database;
java.lang.NoSuchMethodError: liquibase.database.DatabaseFactory.findCorrectDatabaseImplementation(Ljava/sql/Connection;)Lliquibase/database/Database;
        at liquibase.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:93)
        at liquibase.commandline.Main.doMigration(Main.java:578)
        at liquibase.commandline.Main.main(Main.java:97)
$

MY COMMAND LINE SCRIPT:
sh #!/bin/sh

LIQUIBASE="…/liquibase-1.9.5/liquibase"

DRIVER=“oracle.jdbc.OracleDriver”

USERNAME=“mdb”
PASSWORD=“redacted”

CHANGELOGFILE="…/changelogs/baseline.xml"

URL=“jdbc:oracle:thin:@redacted:1521:redacted”

$LIQUIBASE --changeLogFile=$CHANGELOGFILE --username=$USERNAME --password=$PASSWORD --url=$URL --driver=$DRIVER generateChangeLog

Any chance you have multiple versions of the liquibase jar file in your classpath?

Nathan