your code is okay, I have no problems running it with LaTeX. So I can only guess, what happens. Do you have a \usepackage{graphicx} in the preamble?
sorry, it should be \usepackage{color}
Herbert
your code is okay, I have no problems running it with LaTeX. So I can only guess, what happens. Do you have a \usepackage{graphicx} in the preamble?