Look on the Settings tab and make sure the DarqUI folder is pointing to the correct location. The helper watches your character's log file for instructions, and if it can't find the log for your currently logged-in character it won't do anything. Also verify that you selected Live, Test or Beta on the Identity tab if this is a live server, or Origins if your character(s) are on Anashti Sul.
When you log in to the game and the helper is pointing to the correct folders, Character and Server labels should show the current character's information. The log file label should show
\Servername\eq2log_Charname.txt and Game status should show
1 instance.
