ADT plugin for eclipse helios on Win7 64 bit install error

I'm trying to install the ADT plugin for Eclipse and I get this error:

An error occurred while installing the items session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Install, operand=null --> [R]org.eclipse.jdt.debug 3.6.1.v20100715_r361, action=org.eclipse.equinox.internal.p2.touchpoint.eclipse.actions.InstallBundleAction). The artifact file for osgi.bundle,org.eclipse.jdt.debug,3.6.1.v20100715_r361 was not found.

my OS: Win7 64bit

Eclipse version: He开发者_高级运维lios Service Release 2

Build id: 20110218-0911

ADT Plugin URL used: http://dl-ssl.google.com/android/eclipse/

This is really starting to be confusing x.x

Are you following the instructions here?

You can also try to download the adt zip file and try to install it as an archive http://dl.google.com/android/ADT-11.0.0.zip

I have too win7 64bit and used Galileo, Helios and Indigo without any problem.