How to deltav enable a collection

Hello

We tried the following

1. remove all stores
2. change the deltav.xml file within the webdav folder (copy & paste)
following is the content of this file

<?xml version="1.0" encoding="UTF-8"?>


/history
/workspace
/workingresource
checkout-checkin
true
forbidden
forbidden



3. restart webdav server
4. inodavrepair -allstores

We get following error

D:\Tamino3\WebDav3.1.4\bin>inodavrepair -allStores
*** Start of repair process
java.lang.NullPointerException
at com.softwareag.xtools.xdav.util.repairer.RepairHandler$RepairUnit.equ
als(Unknown Source)
at java.util.ArrayList.indexOf(ArrayList.java:203)
at com.softwareag.xtools.xdav.util.repairer.RepairHandler$RepairUnitHand
ler.registerStore(Unknown Source)
at com.softwareag.xtools.xdav.util.repairer.RepairHandler$RepairUnitHand
ler.registerStore(Unknown Source)
at com.softwareag.xtools.xdav.util.repairer.RepairHandler.repair(Unknown
Source)
at com.softwareag.xtools.xdav.util.repairer.RepairHandler.repair(Unknown
Source)
at com.softwareag.xtools.xdav.tools.repairer.Repair.main(Unknown Source)


End of repair process ***


What is wrong in our technique
How to make it work

Regards
Jose