The nature of these archived files is that many of them are older than a few weeks, so if you want to view the information, you'll need to tweak your Trail Talk Forums personal preference settings.
Look in My Home under Display Preferences. In the Default aged threads to be displayed drop-down menu, select View All...
This will allow you to view ALL of the threads by date in ALL of the forums... if you want to toggle back to a limited view after you're done in the Archives, use the same process to navigate to the Default aged threads to be displayed drop-down menu and select a shorter time period.
Hope that helps,