Fuse IDE 7.1. does not work with Eclipse Kepler. It only works with Eclipse 3.x. The Fuse IDE 6.0 (From JBoss) works with Eclipse 4.0. And the upcoming JBoss Fuse IDE 6.1 is likely to work with latest Eclipse 4.x version when its released.
You can see the Fuse IDE 7.1 documentation here: https://access.redhat.com/site/documentation/Fuse_IDE/