d.grid and use of

Good Afternoon,

I'm trying to get a grid 50km x 50km over a map projection I have.

Using d.grid I go through the steps puuting in the below

d.grid

OPTION: Size of grid to be drawn
     key: size
  format: value
required: YES
enter option > 50000

You have chosen:
  size=50000
Is this correct? (y/n) [y] y

OPTION: Sets the current grid color
     key: color
default: gray
required: NO
enter option > red

You have chosen:
  color=red
Is this correct? (y/n) [y] y
OPTION: Lines of the grid pass through this coordinate
     key: origin
  format: easting,northing
default: 0,0
required: NO
enter option > -81.19,50.0

You have chosen:
  origin=-81.19,50.0
Is this correct? (y/n) [y] y

But all I can display is two red lines in the easting,northing position on the
outside of the map frame. I've tried using a smaller resolution e.g 50
but the same display appears.

Once I have this grid I'll need to print it out overlayed on the map of course
can this be done ?