Users disappeared after restart service on win2k864

Hi guys , I’m a new openfire guy and I’ve installed the the openfire 3.8.2 with windows server 2k8 64, we have created 2 user yestarday and 4 user today.

Today afternoon I restarted the open fire service and I have seen that the user that I created today has disappearded and also the configuration done on the server.

we dont know how why it has been happening, could you please tell us whats wrong on that?

Thanks in advance with your help

Leandro