[plt-scheme] Starting Mred without a display

I got the following error message when trying to require "plot.ss", so
i can make and save a .png file:

dynamic-require: unknown module: #%mred-kernel; need to run in MrEd
instead of MzScheme

so I tried: "mred" and got:

$ mred
DISPLAY environment variable not set and no -display argument

Is there a way to set the display to "null"?

Corey

-- 
((lambda (y) (y y)) (lambda (y) (y y)))