Wipeout Mask DraftSight R1.4

Have searched this forum & cannot find an answer I'm looking for. The issue I have is that I have inserted an image into my drawing. The image has details I wish to omit. When I use the wipeout or the mask commands the details are excluded from the model space environment. The issue I have is when I go to plot the drawing the details that were excluded in the model space environment re-appear on the plot preview, this makes no sense. I have tried setting the fames to off & on using the Defpoints layer but still no joy.....need help with this please.