Gradle Eclipse Plugin Installation Issue

Hi I am trying to download Gradle Eclipse plugin. I have tried for Eclipse 4.4 (Luna), 4.3 (Kepler) and 4.2 (Juno) with appropriate Gradle versions. I get erros as follows : Could some help resolve the issue please.

I get errors like this : An error occurred while collecting items to be installed session context was:(profile=epp.package.standard, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=). Unable to read repository at Read timed out