Error: Missing delimiter $

[Xage]

Hello,

i have a little Problem with the design for one variable.

Code:
\documentclass{beamer}

\usepackage[latin1]{inputenc}
\usepackage{amsmath}

\begin{document}
\frame
{
$\chi_t= \left\{
\begin{tabular}{l}
1...arbeitet\\
0...pensioniert\\
\end{tabular}
\right$
}

\end{document}


it looks fine, but i always get this nasty error:

Missing delimiter (.inserted).
<to be read again>
$


how can I get rid of this error?
thanks in advance

[u_fischer]

There is dot missing after \right: \right.$

[Xage]

thanks a lot