What should i click test server or qel
If you used the installer, you'll have 2 (or 3?) icons on your desktop. The main testing is being done on the QELServ Test server. Sometimes however, testing is taking place on the QELServ Dev server. No harm in trying them both (test then dev).
I also added a little image to see what's going on on the TEST server to the main page:
http://qelserv.quadronyx.org/QELServ/Server