Cannot see a list of users but my ICUII directory says Online
If your iCu2 Directory states Online but you cannot see any names in the directory.
Go to View | User Display Filter (top of the iCu2 Directory window) and remove the ticks/checks from "Only show users with video capability" and also from "Only show users with profiles" so that it looks like this:

Press OK after removing the ticks/checks. Then move to another Directory and look at the top line of your Directory window.
If it says Please remove profanity / and advertising from your directory entry, click here for information: http://www.iCu2.ws/faqs/misc/profanity.html
Or
If it says Old Version, visit www.iCu2.com/download and download / install the latest version of iCu2.