Open Source Document Management System | OpenKM

Hell,
I m new to OpenKM.
I have installed correctly OpenKM on my Ubuntu server. I was able to work on it. I ve tried to reopen it after one day on http://localhost:8080 and now doesnt work!

Whats happened???????????
Everything else on my server works perfectly

First see if there's some java process in your server.
If not try starting application again. Depending how you close terminal - if openkm is not a service - you're killing the application, consider configure as service ( configure jboss as service explined on wiki.openkm.com ( installation guide ) or in google "configure jboss as service"

There's some error in server.log file ( at server/default/log )
How much memory do you've got on this server ?