nginx proxy zope/webdav, can??t see files

[mictlan tecutli]

> Probably, the problem is that in nginx case you use "PROPFIND /dav/nomndaa1/"
> while server responses to "PROPFIND /nomndaa1/" or "PROPFIND /plune/nomndaa1/"
> (according previously posted configuration). This may confuse the client,
> if it expect to see response to "PROPFIND /dav/nomndaa1/": response may
> have "/nomndaa1/" or "/plune/nomndaa1/" pathes.

so if i understand i should be able to fix this with a proxy_redirect like:

proxy_redirect   http://10.10.10.30:1980/nomndaa1/ http://$host:$server_port/dav/ 
this _is not_ working for me. the following is the client request, nginx and zope responces, as well as a modified vhost for nginx. 

thanks

client:
Sending request headers: PROPFIND /dav/ HTTP/1.1  Host:
lapalabradelagua.org  User-Agent: davfs2/1.3.3 neon/0.28.2  Connection:
TE  TE: trailers  Depth: 1  Content-Length: 314  Content-Type:
application/xml

nginx log:
"PROPFIND /dav/ HTTP/1.1" 207 11500 "-" "davfs2/1.3.3 neon/0.28.2"

zope log:
"PROPFIND /nomndaa1/ HTTP/1.0" 207 11784 "" "davfs2/1.3.3 neon/0.28.2"

complete nginx vhost:
                server {
                        listen 10.10.10.20:80;
                        server_name .myhost.org;
                        if ($request_uri ~* ^/login_(.*)) {
                            rewrite ^/login_(.*) https://$host/login_$1 permanent;
                            break;
                            }
                            location /dav/ {
                                proxy_pass http://10.10.10.30:1980/nomndaa1/;
                                proxy_pass_header   Server;
                                proxy_set_header Host $http_host;
                                proxy_set_header  X-Forwarded-For $remote_addr;
                                proxy_redirect   http://10.10.10.30:1980/nomndaa1/ http://$host:$server_port/dav/;
                                }
                            location / {
                                     proxy_pass  http://10.10.10.30:6081/VirtualHostBase/http/myhost.org:80/nomndaa1/VirtualHostRoot/;
                                     proxy_set_header Host $http_host;
                            }