openjms0.7.7 / postgres problem

Hello,
I have tried to create the openjms.db with postgres but I have got the
following result 

r;..\lib\openjms-tools-0.7.7-alpha-1.jar
11:09:23.234 ERROR [main] - org.exolab.jms.persistence.PersistenceException:
Dat
abase does not support type=varchar(20)
org.exolab.jms.persistence.PersistenceException: Database does not support
type=
varchar(20)
        at
org.exolab.jms.tools.db.SchemaBrowser.getType(SchemaBrowser.java:188)

        at org.exolab.jms.tools.db.RDBMSTool.getSQLType(RDBMSTool.java:277)
        at org.exolab.jms.tools.db.RDBMSTool.create(RDBMSTool.java:164)
        at org.exolab.jms.tools.db.RDBMSTool.create(RDBMSTool.java:110)
        at org.exolab.jms.tools.db.DBTool.create(DBTool.java:142)
        at org.exolab.jms.tools.db.DBTool.main(DBTool.java:256)








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