Unwanted scaling when exporting as PLT from CorelDRAW 11 to flatbed twill cutter

I'm experiencing a recurring problem with unwanted (minor) size change when exporting PLT files from CorelDRAW 11 to my Ioline flatbed twill cutter. Anyone know how to prevent this from occurring? It's usually no big deal, but now that I'm cutting appliques for embroidery it's messing things up big time. When I export a 7" X 7" square it ends up being cut as (approx) 6.8" X 6.8". Any help or tips would be appreciated. Thanks.