You saying you uninstalled and re-installed it and "it doesn't work" is no help to anyone trying to help you because you're not giving detail as to what you've fully done and exactly what isn't working.
First, are you using our latest code from Github (zip available at
https://github.com/Nayruden/Ulysses ). If using our 'release' at ulyssesmod.net/downloads.php, it's been broken by GMod a few times.
Second, have you tried disabling/removing all other addons/workshop or otherwise?
There are a few that "hack" ULX from working for everyone except the exploiter. (Just search this forum for the word "exploit", several posts exist, one even mentions which addon a user found to be bad.
When you "uninstalled" it, did you remove the
data folders as described in our FAQ "
How do I uninstall ULX/ULib?" (Removing the ADDONs folders is NOT enough, the DATA folders contain the permissions granted during use)
When you re-installed it, after PROPERLY uninstalling, did you add yourself as "superadmin", following the FAQ "
How do I make myself admin? (3 simple foolproof methods)"
If the info and FAQs above don't help, then follow, step by step, the FAQ "
Having trouble with access?"
When completing EVERY step in that FAQ, if you don't have access, come back with the information it requests.