beamer and pstricks

Hello I am using the beamer-conference-ornate template and I like to insert pstricks code within. I get the following error when any pstricks code is insert "undefined control sequence missing $ inserted .." here is the sample of code \newrgbcolor{zzttqq}{0.6 0.2 0} \psset{xunit=1.0cm,yunit

Re: beamer and pstricks

Here is the preamble \usetheme{Warsaw} % or ... \setbeamercovered{transparent} % or whatever (possibly just delete it) \usepackage{pstricks} and I try other package with no more success