[Xy-pic] dvips problem

[Witek Kwiatkowski]

Hi all,
I have problem with colors using dvips options.
\xyoption{ps}
\xyoption{color}
\xyoption{dvips}

\UseCrayolaColors
\xygraph{
[]*++{C}*[Brown]\frm{**}}

processed with latex and dvips gives black frame. No warning is 
produced. (all crayola colors are black but simple red etc works fine)
Moreover \newxycolor{zz}{0. 1. 0.5 rgb} causes ghostscript error 
whenever I want to use zz.
Is it working for everyone else?
I also checked that this works using pdf option and pdflatex, however 
thicker lines are not.
Witek