[pstricks] Problem with \rput and \uput

[DarkShakal]

Hello,

i have a problem with pstricks-add.
If i want to place a text as a label with \rput or \uput, the text is 
alway in the origin. Other coordinates have no effect , too.
for example the code:
\documentclass[12pt,a4paper]{article}
\usepackage{pstricks-add}
\begin{document}
\begin{pspicture}(-2,0)(2,1)
\qdisk(4,0){2pt}
\rput[tl](4,0){$(x,y)$}
\end{pspicture}
\end{document} --> result can you see in attachment

Can anyone help me with this problem ?

nice day,
john