Eclipse Scala IDE 2.0.0 (RC4) for Scala 2.9 and 2.8 is out

I have these problems in Eclipse 3.6:

uninstalling JDT Weaving for Scala
==================================
Cannot complete the install because one or more required items could
not be found.
Software currently installed: Scala IDE for Eclipse
2.0.0.201106012217-beta5-29-816aa9f (org.scala-
ide.sdt.feature.feature.group 2.0.0.201106012217-beta5-29-816aa9f)
Missing requirement: configure.org.eclipse.equinox.weaving.aspectj
1.0.0 requires 'bundle org.eclipse.equinox.weaving.aspectj 0.0.0' but
it could not be found
Cannot satisfy dependency:
From: Scala IDE for Eclipse 2.0.0.201106012217-beta5-29-816aa9f
(org.scala-ide.sdt.feature.feature.group 2.0.0.201106012217-
beta5-29-816aa9f)
To: configure.org.eclipse.equinox.weaving.aspectj 0.0.0

updating:
=========
An error occurred while collecting items to be installed
session context was:(profile=epp.package.java,
phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=,
action=).
Unable to read repository at
http://download.scala-ide.org/releases-29/stable/site/plugins/org.scala-....
Read timed out
Unable to read repository at
http://download.scala-ide.org/releases-29/stable/site/plugins/org.scala-....
Read timed out
Unable to read repository at
http://download.scala-ide.org/releases-29/stable/site/plugins/org.scala-....
Read timed out

So I can not uninstall JDT Weaving for Scala and I cannot install the
new scala-ide completely.

What can be the problem?

On 13 dec, 11:47, Eclipse Scala IDE
wrote:
> A new Release Candidate (RC4) for the coming 2.0.0 final release of the Scala IDE for Eclipse is ready for download!
>
> This release candidate contains one single fix that makes the Scala IDE and the Groovy IDE compatible again. We will wait one week before issuing a final release, in order to allow developers and testers to send us their feedback.
>
> If you are currently using Scala IDE RC2 or older, please read carefully the following instructions to successfully upgrade. First, you will need to uninstall the 'JDT Weaving for Scala' feature. To do so, simply open Eclipse and click on the 'About Eclipse SDK' menu (you can access it under the 'Help' menu item if you are on Windows, or the 'Eclipse' menu item if you are on OSX). Then, click 'Installation Details' and look for the 'JDT Weaving for Scala' feature. Select it and click the 'Uninstall' button, located at the bottom right corner. Once 'JDT Weaving for Scala'  is uninstalled, go ahead and upgrade to RC4 as usual.
>
> (In case 'JDT Weaving for Scala' did not appear in the list of your installed plugins, then you can upgrade to RC4 as usual, it should work just fine.)
> As usual, this release comes in two flavors: the 2.9.1 version, and the 2.8.3-SNAPSHOT version.
> The 2.8 compiler shipped with this version of the plugin is based on the development branch of 2.8.3, and is fully binary compatible with both 2.8.2 and 2.8.1. It contains the same improvements to the presentation compiler as the 2.9 version, and a number of bug fixes related to Java signatures. Also note that the 2.9.1 compiler shipped with this version of the plugin is fully binary compatile with both 2.9.0-1 and 2.9.0.
> What's new:
> * Scala IDE compatible with Groovy IDE. [#1000798]
>
> A list of fixed tickets for this release is available here:
>
> http://scala-ide-portfolio.assembla.com/spaces/ae55a-oWSr36hpeJe5avMc...
> You can install the new release by pointing Eclipse to the following update site:
> for the 2.9.1 version:http://download.scala-ide.org/releases-29/stable/site
> for the 2.8.3-SNAPSHOT version:http://download.scala-ide.org/releases-28/stable/site
> Other releases can be found at:http://download.scala-ide.org
> Both plugins are ensured to work with Eclipse 3.6 (Helios), which is currently the officially supported Eclipse platform for the Scala IDE. Support for Eclipse 3.7 (Indigo) is experimental.
>
> Happy Scala coding!
>