This doesnt effect everyone but has solved the issue for most.
Is this a fresh install of eq, that has NOT been on another server ? (no fibs to get out of installing a fresh install, for some this is an issue)
Did you remove/rename the old spell file from the eq directory before placing the new THF spell file there ? (the spell file does not like to overwrite the original existing spell file unless it is a previous dated one from THF).