A Crafted Handwraps Problem

[IssamTP]

Hi everybody.
First, I want to say I'm sorry if I'm in the wrong place for this post, but I couldn't find a better one.
The problem is that some days ago, I've crafted a handwrap that has these three enchs:

1. +2 Ench. (ok, we all know what +2 does)
2. Lesser Undead Bane; (pratically an extra 1d6 damage to undead)
3. Roaring; (causes target to become shaken and, on a critical hit does 2d6 sonic damage to the target)

Now, when I hit undeads, I see "Immune -1d6". Before this weapon I used a handwraps with ench 1. and 2., but thundering instead of roaring. The result was: "-damage -1d6" and on criticals "-damage -1d6 -1d8".

What is the problem?

[RenigadeWolf]

This is not a crafted Handwrap bug at all; Undead are immune to Shaken, and other fear effects. (with the exception of Ghoul Touch, which causes a fear-like effect in them) It is the same if they hit you while wearing a fearsome item, cast the fear spell, or the Dark Monk strike that causes Shaken.