New install, XWikiPreferences doesn't work

[Neil Sedger]

Hi all,

I've followed the install procedure for XWiki 1.1 milestone 3 - using 
HSQL and OC4J. It works in that I can go to

  /xwiki

and I get a page 'XWiki Installation' with links to Installation 
Instructions and the XWiki Home Page.

The next step according to the documentation is to import the default 
wiki XAR file. But when I go to:

   xwiki/bin/admin/XWiki/XWikiPreferences

I get a '500 Internal Server Error' along with:
'Servlet error: An exception occurred. The current application 
deployment descriptors do not allow for including it in this response. 
Please consult the application log for details.'

The xwiki.log file shows the following message:

11:24:11,716 [AJPRequestHandler-RMICallHandler-6] WARN 
action.RequestProcessor         - Unhandled Exception thrown: class 
com.xpn.xwiki.XWikiException


Any suggestions please?

Thanks
Neil