LyX ⇒ qtree | Installation an Integration

[Aoshi]

I would like to install the qtree package mentioned in the LyX Wiki:
http://wiki.lyx.org/LyX/LinguistLyX#toc8

I downloaded the style form "qtree.sty" from
http://www.ling.upenn.edu/advice/latex/qtree/

and I ran the following install script

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#!/bin/bash
mkdir -p $(kpsewhich -var-value TEXMFLOCAL)/tex/latex/qtree
cp qtree.sty $(kpsewhich -var-value TEXMFLOCAL)/tex/latex/qtree/
mktexlsr

Then I used "Tools->Reconfigure" and restarted LyX. I added \usepackage{qtree} to my document preamble.

But I still get the following error message, when I try to compile (CTRL+R) my document:

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! LaTeX Error: File `qtree.sty' not found.

Any ideas?