DAVExplorer is not connecting. Connecting to a WebDAV Server states:

Once you have entered a location URL, and (if necessary) your login name and password, DAV Explorer will connect to the remote WebDAV server, and request a listing of the resources there. A hierarchical view of the sub-collections will be displayed

Invoke Apache Jackrabbit

$ java -jar jackrabbit-standalone-2.0.0.jar --port 8200
Welcome to Apache Jackrabbit!
-------------------------------
Using repository directory jackrabbit
Writing log messages to jackrabbit/log
Starting the server...
Apache Jackrabbit is now running at http://localhost:8200/

Use DAVExplorer

$ java -jar DAVExplorer.jar 

Then connect to localhost:8200/repository/default/ which pops up:

Login
=====
Login name: [admin]
Password: [admin]
<OK>

The pop up closes then nothing changes.

Using cadaver confirms Jackrabbit is working:

$ cadaver http://localhost:8200/repository/default/
Authentication required for Jackrabbit Webdav Server on server `localhost':
Username: admin
Password: 
dav:/repository/default/> ls
Listing collection `/repository/default/': succeeded.
Coll:   com                                    0  Mar 13 11:07
Coll:   it                                     0  Mar 13 11:07
Coll:   net                                    0  Mar 13 11:07
Coll:   org                                    0  Mar 13 11:07
Coll:   za                                     0  Mar 13 11:07