Dru,
Recredential database process is one of the last processes that executes. This process is essential for setting up security for your data. If this fails then Amazing Charts will not be able to read the database.
One thing that is easy, that you can try is to simply restart the computer and run the install again. If you want to self-diagnose further, open your Amazing Charts directory and the Logs sub-directory. Open the RecredentialDatabase log file found there. Go to the end of the log file and work your way up to see if it shows what failed. If no log file exists, then you have some type of permissions issue where the Recredential Database process cannot write a log file. Double check permissions for this directory that Everyone has full permissions.
Beyond this CS will need to investigate the problem. Let them know what you have done so far and have the Log file for Recredential Database available.