A couple of possibilities spring to mind.
First, have you considered the new Arizona firmware branch? (3.33-2.xx) It has improved networking features which should solve this problem for you. It does require the use of a permanently inserted CF card however, but you are entitled to one from Neuros. Check out this age:
http://open.neurostechnology.com/content/osd-arizona-firmware-release-333-209-00871Or if you wish to remain with 3.33-1.75, you could try telnetting in to your OSD and trying to create the network share manually. This isn't the easiest option, but
this guide is a place to start.
-G