GlobalFax Resolution Problem

[AWD 4]

I cannot work out how to fax at higher than 72dpi in VectorWorks. I know there used to be a problem between minicad and global village fax software but thought that long past. The only option I get in the resolution box of globalfax is 72dpi which results in jagged curves and unreadable rotated text. I am using Vectorworks 8.5.2 on a Powerbook G3/500. Please Help. I need to be able to fax my designs to clients.