User-Manager Stopped working

I finally got in to user manager on my Mikrotik RB2011UAS Router, and imported database and deleted users I don’t want on this router, I have configured a new user but it will not work, I can point radius settings to my main network Radius Server that uses Daloradius, the user connects, if I point it back to User Manager user will not connect.

It was working OK it just seems to have stopped.

Hi can u be more elaborate on the current situation and the help u neex? Which one work and which did not work?

check System > Resources > Free HDD space. UM stops working with less then 400 kbytes as I am aware of.