That means you didn't installed any connectors. so, to install the connectors, follow the steps below.
In Eclipse, goto help--> Install New Software
in,install window, enter the below url in work with text field http://community.polarion.com/projects/subversive/download/eclipse/2.0/update-site/
then in the below box you'll get list of connectors, select those and click next...
EDIT:
The link is an update site for Eclipse 2.0 which is quite old. For Eclipse Luna, this page gives the instructions. Copy this link for the update site if you know the procedure.