Missing Requirement installing JBoss Extension

Get the following after trying to install new JBossAS Tools Extenion under Servers:

http://download.eclipse.org/webtools/downloads/drops/R3.4.0/I-3.4.0-20120426145544/repository/

Cannot complete the install because one or more required items could not be found.
Software being installed: JBossAS Tools 2.3.0.v20120504-0300-H103-Beta3 (org.jboss.ide.eclipse.as.feature.feature.group 2.3.0.v20120504-0300-H103-Beta3)
Missing requirement: JBoss AS Core Plug-in 2.3.0.v20120504-0300-H103-Beta3 (org.jboss.ide.eclipse.as.core 2.3.0.v20120504-0300-H103-Beta3) requires 'bundle org.eclipse.pde.core 3.7.0' but it could not be found
Cannot satisfy dependency:
From: JBossAS Tools Server / Compression Integration 2.3.0.v20120504-0300-H103-Beta3 (org.jboss.ide.eclipse.as.archives.integration.feature.feature.group 2.3.0.v20120504-0300-H103-Beta3)
To: org.jboss.ide.eclipse.as.core 0.0.0
Cannot satisfy dependency:
From: JBossAS Tools 2.3.0.v20120504-0300-H103-Beta3 (org.jboss.ide.eclipse.as.feature.feature.group 2.3.0.v20120504-0300-H103-Beta3)
To: org.jboss.ide.eclipse.as.archives.integration.feature.feature.group [2.3.0.v20120504-0300-H103-Beta3]