pgfplots –> fillbetween

Hi,
I try to use tikzpicture with the Quicklatex Plugin. Now i get the message:

*** Error message:
I can’t find file `pgflibrarypgfplots.fillbetween.code.tex’.
leading text: \usepgfplotslibrary{fillbetween}

Can you help me please? ??

Here the Code:

[latex]

\begin{tikzpicture}
[+preamble]
\usepackage{tikz}
\usepackage{pgfplots}
\usepgfplotslibrary{fillbetween}
\usetikzlibrary{patterns}
\usepackage{color}
/listfiles
[/preamble]
 \begin{axis}[
 axis equal,
 %domain=-3:3,
 grid,
 grid style={dashed,gray!30},
 smooth,
 xmin=-2, xmax=2,
 ymin=-1.5, ymax=3.5,
 axis lines=middle,
 xlabel=$x$,
 xlabel style={below, anchor=north east,inner xsep=0pt},
 xtick={-2,...,2},
 ylabel=$y$,
 ylabel style={above,anchor=north east,inner ysep=0pt},
 ytick={-1,...,3},
 samples=100,
 %legend cell align=left,
 %legend pos=outer north east,
 legend style={at={(1,1)},xshift=0cm,anchor=north east,nodes=right,fill=none}
 ]

 \addplot[red,name path=f1,mark=none,domain=-2:2,line legend,thick] {3-x^2};
 \addlegendentry{$f_{1}(x)$}

 \addplot[blue,name path=f2,mark=none,domain=-1.4:1.4, line legend,thick] {3*x^2-1};
 \addlegendentry{$f_{2}(x)$}

\path[name path=lower,intersection segments={of=f1 and f2,sequence=B0 --A1}];
\addplot[pattern=north west lines, pattern color=green]fill between[of=f2 and lower];
\addlegendentry{$\cal{A}$}
\end{axis}
\end{tikzpicture}

[/latex]