I am having the same problem. I set moderator in the forum prferences, but when I go to the forum only admin moderator shows up.

In the database, forum table shows the moderator ID, but the moderator table is empty.

Any ideas?

ok i found out how to add users to MODERATOR level for a specific FORUM
and im sorry i never came back and posted the HOW TO on it

here we go

1) Gots Admin area
2) scroll over FORUMS button
3) Click on FORUM
4) Click EDIT for the forum you created previously
5) In the section listed as "Moderator(s):" is the words
List | Search | Delete
6) Click the one shown as SEARCH
7) Find the user you want to make the Moderator of that forum

well thats it

Ah... sorry have just found the solution to my problem.... there must be at least one post in the forum before the moderator shows up