configurate ADT plug in for Eclipse

When I try to configurate as per page 10 and 11 (fig 1-3, 1-4), I got the following error message :

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,,16.0.1.v201112150204-238534
No repository found containing: org.eclipse.update.feature,,16.0.1.v201112150204-238534
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