Problem installing Google App Engine (AE) plugin on Eclipse Helios

When installing Google Application Engine (AE) Eclipse plugin, missing dependencies message showed :

Cannot complete the install because one or more required items could not be found.
Software being installed: Google Plugin for Eclipse 3.6 1.4.2.v201012211742
(com.google.gdt.eclipse.suite.e36.feature.feature.group 1.4.2.v201012211742)
Missing requirement: Google Eclipse 3.6 Platform Plugin 1.4.2.v201012211742 (com.google.gdt.eclipse.platform.e36 1.4.2.v201012211742) 


Environment : Fedora 14, Eclipse Helios (3.6.1) installed using GNOME Add / Remove Software.

Add Eclipse Helios Update Site