pstricks package not showing ouput despite no erros in tex window

documentclass[12pt]{article}
usepackage{pstricks}
begin{document}
This is a line
begin{pspicture}(0,0)(10,6)
psline[linewidth=2 pt]{<->}(2,1)(6,4)
end{pspicture}
end{document}

no line is drawn only the text is shown. How should i proceed