In order to use ps2pdf, you need to set -dNOSAFER option because some scripts requires to run other script files.
> ps2pdf -dNOSAFER ****.psOr, you can use gs with -sDEVICE=pdfwrite.
> gs -q -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=****.pdf ****.ps













