Move face feature

Hi,

I'm confused about the move-face feature.  A model that I am working with had a move face feature, but the dimension was incorrect, so I deleted it and attempted to replicate it with another move-face.  I selected the same faces and the same edge, but it moves the faces in the wrong direction.  It removes material instead of adding it.  How do I get it to do the opposite?

Thanks,

Brian

SolidworksParts And Features