Explain plan fails with DB2 9

I upgraded to DB2 9 and now explain plan throws a NullPointerException (everything else works fine):

java.lang.NullPointerException
    at com.onseven.dbvis.T.D.?(Unknown Source)
    at com.onseven.dbvis.sql.U.?(Unknown Source)
    at com.onseven.dbvis.sql.U.?(Unknown Source)
    at com.onseven.dbvis.sql.U.?(Unknown Source)
    at com.onseven.dbvis.db.db2.DB2ExplainPlanHandler.init(Unknown Source)
    at com.onseven.dbvis.db.db2.DB2ExplainPlanHandler.fetchExplainPlan(Unknown Source)
    at com.onseven.dbvis.M.C.?(Unknown Source)
    at com.onseven.dbvis.M.C.access$500(Unknown Source)
    at com.onseven.dbvis.M.C$A.construct(Unknown Source)
    at se.pureit.swing.util.SwingWorker$2.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Version:
    Product:  DbVisualizer Personal 5.1.1
    Build:  #1162 (2006/10/16 14:11)
    Java VM:  Java HotSpot(TM) Client VM
    Java Version:  1.5.0_10-b03
    Java Vendor:  Sun Microsystems Inc.
    OS Name:  Windows XP
    OS Arch:  x86
    OS Version:  5.1

DB Connection:
    Database Product Name: DB2/NT
    Database Product Version: SQL09010
    Driver Name: IBM DB2 JDBC Universal Driver Architecture
    Driver Version: 3.1.57

I tried different JDBC driver versions with the same result.

It works when connected to DB2 8.

Thanks
Bernd