Error while using lstlisting [closed]

Question

I don't know why I get an error related to this code:

\begin{lstlisting}[framexleftmargin=0mm,basicstyle=\ttfamily\small,breaklines,columns=fullflexible]
xp_sendmail {[ @recipients= ] 'recipients [ ;…n ]'}
   [,[ @message= ] 'message' ]
   [,[ @query= ] 'query' ]
   [,[ @subject= ] 'subject' ]
   [,[ @attachments= ] 'attachments' ]
\end{lstlisting}

This is part of my preamble:

\documentclass[a4paper,singleside,11pt]{report}
\usepackage{ia_urb_thesis}
\usepackage[italian]{babel}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{color}
%\usepackage {listingsutf8}
%\usepackage{tikz}
\usepackage[thinlines]{easytable}
\usepackage{upquote}
\setcounter{secnumdepth}{5}
\setcounter{tocdepth}{5}

\usepackage{listings}
%\lstset{language=PHP}
\usepackage{url}
%\usepackage[pdftex]{graphicx}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath

\usepackage{float}