Install Manager issue - installing a new package

I'm endeavoring to set up a new package of WDSC for trying out different
plug-ins, etc. When I select the Installation Package from my install
package repository, I receive a warning that the package is already
installed, but I can click 'Yes' to install into a new package group.

However when I click on 'Next' to install the package, I'm receiving an
error dialog with the title "Problem Occurred" which reads: "The package
resolve process was canceled by the user. No features can be displayed as
information was not retrieved." I've used this repository package for
other installations without a problem. I've even set up other package
groups on my machine.

I'm looking for any suggestions on how to correct this issue.