What impacts ability for fear spell to stick?

[miethos]

As I have gotten my necromancer close to 30, I am noticing more and more stuff is resisting fear. Some 4 times in a row, in which I give up. Up until about low 20s, I never had this issue besides the occasional resist here and there. But at 29, even stuff that is 7 or 8 levels below me is resisting much more than usual. Is there any stat that directly influences fear or is it just weird coding on the emulator to make it behave this way? (it is a level 4 spell after all) I don't recall having this problem when I played EQ live but that was a long time ago.