Migrating themes & skins from portal version5 to version6

[swaroop kasi]

Hi

Trying migrate websphere portal server 5 version themes and skins to version6.
executed following command in version 5 --->

cd \config
WPSConfig.bat prop-collector -DDbPassword=wpsdb_password

following exception throwing

[java] Exception in thread "main" SQL Exception: Failed to start database '
wpsdb', see the next exception for details.
[java] at db2j.ai.j._e22(Unknown Source)
[java] at db2j.ai.j.newCloudscapeSQLException(Unknown Source)
[java] at db2j.ai.j.generateCsSQLException(Unknown Source)
[java] at db2j.ai.c._vh(Unknown Source)
[java] at db2j.ai.c.(Unknown Source)
[java] at db2j.ax.b.(Unknown Source)
[java] at db2j.aw.c.(Unknown Source)
[java] at com.ibm.db2j.jdbc.EmbeddedDriver30.getNewLocalConnection(Unkn
own Source)
[java] at com.ibm.db2j.jdbc.EmbeddedDriver.connect(Unknown Source)
[java] at com.ibm.db2j.jdbc.DB2jDriver.connect(Unknown Source)
[java] at com.ibm.wps.datastore.tools.DatabaseConnector.openConnection(
Unknown Source)
[java] at com.ibm.wps.datastore.tools.ExportEngine.extractLpidGupidMapp
ing(Unknown Source)
[java] at com.ibm.wps.datastore.tools.Main.main(Unknown Source)

BUILD FAILED
file:../config/includes/propcollector.xml:204: Java returned: 1

Total time: 38 seconds

Please help out,why am getting this exception and how to get rid of it?

Advanced Thanks,
Swaroop