You may need to update SIM to the latest version (this won't update your solutions - just SIM). Open SIM, click on "Settings", and make sure you have a recent products xml file (mine is dated 8/2, btw). Click on "Update now" in the "Settings" form to see if there is an updated version. Typically this resolves issues with the product listings display.
If all that is ok, go back to the SIM screen and click on "View and Install Updates". Set both filter dropdown boxes to "None". Alternatively you can set the first filter to "Product Type" and the second to "Solutions".
The platform (SMP) has to be upgraded to 7.1 SP1 before upgrading the solutions. You can check the documentation central repository for release notes for patch and smp 7.1 here:
http://www.symantec.com/business/support/index?Page=content&key=55274&channel=DOCUMENTATION