I have the following error, when trying to install Grails Support.

Problems occurred while performing installation: The following connectors are not available: Grails Support (id=com.springsource.sts.grails.feature.group, site=http://dist.springsource.com/snapshot/TOOLS/nightly/e3.6)
I have already installed Groovy Support and Grails itself via extension manager so it's not networking problem.

The most strange thing:
I have another error when i've tried to install Grails Support at first time
There is no repository available on: http://dist.springsource.com/snapsho...S/nightly/e3.6
But after i reloaded all repositories(on preferences page) i got exception described on the top.