Eclipse plugin Eclipse-插件安装错误

Eclipse版本我有： 版本：3.4.1（Ganymede） 构建id:M20080911-1700

我在安装eclipse插件时出错。我并没有那个问题，但突然之间我无法安装任何插件，比如PMD、JADclipse等

我得到的错误是：

An error occurred while collecting items to be installed
  No repository found containing: org.aspectj.ajde/osgi.bundle/1.6.4.20090106083800
  No repository found containing: org.aspectj.runtime/osgi.bundle/1.6.4.20090106083800
  No repository found containing: org.aspectj.weaver/osgi.bundle/1.6.4.20090106083800
  No repository found containing: org.eclipse.ajdt.core/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.doc.user/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.examples/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt/org.eclipse.update.feature/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.source/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.source/org.eclipse.update.feature/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.ui/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.aspectj/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.contribution.visualiser/osgi.bundle/2.2.0.20090122141228
  No repository found containing: org.eclipse.contribution.xref.core/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.contribution.xref.ui/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.ajdt.mylyn.ui/osgi.bundle/1.6.3.20090122141228
  No repository found containing: org.eclipse.contribution.weaving.jdt/osgi.bundle/1.6.3.20090122141228

我尝试采取以下步骤，但也没有奏效-

•Software Updates -> Manage sites -> Export (bookmarks.xml)

•exit eclipse

•go to your eclipse/configuration/.settings/org.eclipse.equinox.p2.*.prefs and delete files (after backup)

•Restart eclipse

•re-import bookmarks.xml

有什么建议吗？

这是Eclipse<3.5中的一个例子