This post might help you, this is a common error that folks experience if they copy any sort of directory structure from and old/live EQ installation. Are you starting clean with a Titanium installation & only P99 spellfiles?
You want to start with a clean "UIFiles" directory and use something like the
Velious UI listed in the getting started guide
You will also want to make sure your permissions are happy.. you need to make sure the local user also owns the EQ directories you just copied over.
(open a terminal)
chown -Rv `whoami`.`whoami` /path/to/eq/files
If this does not fix it and you are running clean I would recommend trying to run the 'eqgame.exe' while in the current working directory.
For example...
(open a terminal.. substituting my paths for yours..)
cd ~/.wine/drive_c/Program\ Files/eq_p99/
taskset -c 0 wine eqgame.exe patchme
See what happens there, the benefit of running in the terminal is you get all the verbose feedback.. the "warning:" type messages you can ignore.