When you server starts up, ULib will load, and then ULX, both paste information into the server console.
If it doesn't load, an error will appear.
Please post the first 30 or so lines of your server console at the point where it says Lua 5.1 inistiallized at server startup to help indicate where ULib and or ULX is having problems, or loading properly. Either way, us seeing it will help start the troubleshooting.
Saying "it doesn't work" is no help at all.
Don't expect to call your dr on the phone and say "it hurts, any ideas" and get an answer straight away.