Be sure to check both your client and server console output once you start the server. You should see a bunch of ulib and ulx output to the console if it is loading properly. If you don't see anything ulx/ulib related, then ULX/ULib may not be installed properly, or there could be an issue with FastDL, etc. If you see a bunch of errors, then you should post them here so we can help you figure out what may have gone wrong.