Hi NoxXxphp,

Maybe check this FAQ on Info and Help for ForumUp Emails not Received, it might help:

Only registered users can see links on this forum! Register or Login on forum!

It might be a temporary problem. Otherwise you can activate them, when you're sure they are "normal" users.

Go to your administration panel - user admin - management, type the name of the user - scroll down and there you'll find:

User is active x Yes x No

Tick Yes and hit the Submit button.