[MiKTeX] minus signs not printed

[H. G. <hf...@is...>]

Hi,

My document contains some plots that were generated with Mathematica and
thus contain eps-specials (mostly greek letters). To have them in my final
.pdf I use dvi2ps and then ps2pdf. On screen everything looks fine, but when
I print the .pdf, all "-" are lost. What can I do?

I use MikTeX 2 and WinEdt5

Thanks for the help
hg