Four possible issues:
[1] Your ulx/ulib is outdated (or the newest version killed the addon)
[2] Your server is too slow (bad PC hosting the addon) which interferes with it grabbing plaintext files, ect (which is also why I hate ulx for using plainfiles, and not db)
[3] User error (this is a big issue typically when it comes to garry's mod addons (no offense))
[4] Use my version which is an updated working version of the addon you're using. I personally know Lead4u, and he basically stopped caring about that addon, so yeah.. use my version that works. (
http://forums.ulyssesmod.net/index.php/topic,6791 )
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Also, there is no such thing as "too many ranks", my server used to have 52 ranks, which all worked on a crappy PC, and a really modded PC.