I am trying to upgrade my Joomla civiCRM database from 4.7.16 to 4.7.28. The component upgraded fine but when I try to upgrade the database after following all of the preparation steps, it hangs and makes not progress. I've looked at all of the similar problems, but nothing helps me with my error. I have two questions, how do I know what's going on? And my second question is what is going on and how to I get it to complete the upgrade?