[Zope] Dreamweaver WebDAV & locking ??

[Nigel Head]

I'm sure someone cleverer than I knows how this should work.

Zope 2.4.0, Python 2.1.1, Dreamweaver 4.01

When creating a file for the first time with webdav DW attempts to lock the 
resource, Zope creates Nullresource-Lock item as a placeholder (all well and 
good, I thought) but then DW fails to upload the real contents claiming 
either 'Resource locked' or 'Resource not found'.  I haven't been able to 
figure the system which selects one or other of these two replies.

This smells of pilot error to me so please, anyone who sucessfully uses DW 
webdav, do you have a takeoff checklist ??

Thanks,

Nigel.