[Xy-pic] driver xy-pic (Leonardo De Carlo)

[Zivac]

Hello


> \documentclass{article}
> \input xy
> \xyoption{ps}
> \xyoption{xdvi}
> \xyoption{line}
> \xyoption{arrow}
> % or just \usepackage[ps,xdvi,line,arrow]{xy}
> \begin{document}
> 
> \xy/r8pc/:*++\txt\huge{C}="c"
> ,0*++\txt\huge{P}="p",
> ,"p",{\ar@*{[|(1)]}"p";"c"<20pt>}
> ,"p",{\ar@*{[|(4)]}"p";"c"<14pt>}
> ,"p",{\ar@*{[|(10)]}"p";"c"<4pt>}
> ,"p",{\ar@*{[|(20)]}"p";"c"<-16pt>}
> \endxy
> 
> \end{document}


I have tried to use code above, and it is not working. There are no arrows at
all. If I erase the command \xyoption{ps} there are arrows, but all of the same
size. What is wrong?

Tnx,
Zivac