菜鸟请教

eclipse android developer tools安装时出现
Cannot complete the install because one or more required items could not be found.
  Software being installed: Android Development Tools 15.0.1.v201111031820-219398 (com.android.ide.eclipse.adt.feature.group 15.0.1.v201111031820-219398)
  Missing requirement: Android Development Tools 15.0.1.v201111031820-219398 (com.android.ide.eclipse.adt.feature.group 15.0.1.v201111031820-219398) requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found
怎么办，大神快快现身吧

你看看其他的版本都装好了没，这个我也出现过，不过没影响