Well I'm not totally sure as i use an ultimaker with cura. There should be a setting in makerware that increases the wall thickness or you might actually have to decrease the wall thickness as having thicker walls in the settings than in the model will mess things up. Worst comes to worse you can always just scale it up or actually open it up in a 3D modeling program and actually scale in all the verticies on the inside of the object to make it thicker.

printing but the walls are too thin how in makerware can  i make em thicker