Ok I tried my own setup with the slikstik ctrlr file and it did just fine, so it isn't an issue with the file.
In your mame.ini you should have these settings set in this way:
ctrlr_directory ctrlr
ctrlr slikstik
Your roms directory has nothing to do with j5, although if your ini file is corrupted (in other words you used improper syntax in some way) then it could have trouble reading the ini file in general. I don't see how, but hey, it could happen.