AvantFAX update
I just finished looking around the Internet and found out that the new version of PHP is a culprit in not being able to access the AvantFax management page (the "sign-in" page works once and then you are presented with blank error pages).
The author of AvantFax recommends a change to the __autoload function in classes.php. I found that his suggestion doesn't work the way it should. He left out the path information for the file_exists() function, so all of the classes were basically unfound.
Here's what I'm using right now and it seems to be working most of the time.
if (file_exists('/var/www/html/avantfax/includes/' . $class_name . '.php'))
require_once $class_name . '.php';
}
There still might be a problem or two, but this is getting me closer to getting the program working.