Unable to install eclipse plugin

Hi,
I'm try to install eclipse plugin but failed to install as following reason .I'm using eclipse kepler with JRE 1.7 on Ubuntu 12.04

The operation cannot be completed. See the details.

Details:

Cannot complete the install because one or more required items could not be found.
Software being installed: BrightScript Core 1.0.0.201310291810 (com.roku.brightscript.ide.eclipse.core.feature.group 1.0.0.201310291810)
Missing requirement: BrightScript Plugin 1.0.0.201310291810 (com.roku.brightscript.plugin 1.0.0.201310291810) requires 'bundle org.eclipse.dltk.debug.ui [2.0.0,2.1.0]' but it could not be found
Cannot satisfy dependency:
From: BrightScript Core 1.0.0.201310291810 (com.roku.brightscript.ide.eclipse.core.feature.group 1.0.0.201310291810)
To: com.roku.brightscript.plugin [1.0.0.201310291810]