I need some help in getting the usermanager to work.
I have installed UM 4.5 into my RB433AH box and I am able to access it through http://router_ip/userman but it appears like the UM is not talking to the routerboard.
I cannot see the users I had added to the box using winbox when I check user in the UM.

User Manager configuration interface is not added to the Winbox. In other words you are not able to add users to User Manager by Winbox (only by console).
Basic HotSpot+User Manager configuration example is given here,
http://wiki.mikrotik.com/wiki/User_Mana ... ot_Example
Add users by web interface from http://router_IP/userman (the most recommended way).