Failed to discover all connectors error

Hello,

In Developer Studio (JBoss Developer Studio) someone advise me to replace the line

-Djboss.discovery.directory.url=https://devstudio.jboss.com/updates/6.0/staging/devstudio-directory.xml with Djboss.discovery.directory.url=http://www.qa.jboss.com/binaries/RHDS/updates/development/6.0.0.Alpha1.extras/devstudio-directory.xml

in jbdevstudio.ini.

When I put an empty jbdevstudio-directory.xml file up on https://devstudio.jboss.com/updates/6.0-staging/devstudio-directory.xml, I am getting these errors. Is there any solution for it? Thanks for any help.

No Connectors Found

Connector discovery completed without finding any connectors. Please check

your internet connection and try again.

                                                                                                            OK

Problem Occurred

Failed to discover all connectors.

See 'Details' for more information.

Show Error Log                        <<Details         OK

Failed to discover all connectors.

RemoteBundleDiscoveryStrategy failed with an error

Discovery directory is empty