Unable to save documents to Network Location with Vista-Office 200

Hello,

I have set up a Network Location to a WebExOne office but can not save
documents there. They come up as read only. When I try to do a 'Save as' I
get a 'Document not saved.' error.

I do have a Network Place set up on anther PC that has XP Pro and Office
2003 and it works fine.

Any help would be greatly appreciate!

Thx,
vlh