[SOLVED] WebDav Mounting in Ubuntu.

[Firstime]

Hi all!!

I'm trying to mount my Briefcase docs in a folder in ubuntu.
I followed the steps of WebDAV - Zimbra :: Wiki
I installed davfs2 and I reconfigured it.
When I type

# mount -t davfs https://mail.mydomain.net/home/firstime@mydomain.com/Briefcase /home/administrador/montado/

The source of the comand is:

Please enter the username to authenticate with server
https://mail.mydomain.net/home/firstime@mydomain.com/Briefcase or hit enter for none.
Username: firstime
Please enter the password to authenticate user firstime with server
https://mail.mydomain.net/home/firstime@mydomain.com/Briefcase or hit enter for none.
Password:
/sbin/mount.davfs: the server certificate is not trusted
  issuer:      Zimbra Collaboration Suite, Zimbra Collaboration Suite, N/A, N/A, US
  subject:     Zimbra Collaboration Suite, Zimbra Collaboration Suite, N/A, US
  identity:    mail.mydomain.net
  fingerprint: 35:d6:02:b6:67:58:15:a9:bb:e2:9c:3e:ef:26:b0:84:1e:27:2f:f6
You only should accept this certificate, if you can
verify the fingerprint! The server might be faked
or there might be a man-in-the-middle-attack.
Accept certificate for this session? [y,N] Y
/sbin/mount.davfs: mounting failed; the server does not support WebDAV

At the end I have an error saying that the server doesn't suppor WebDav, but I installer davfs2.
If I try to connect in Windows by NetDrive, the server return me another error.
If I put this link https://mail.mydomain.net/home/first....com/Briefcase in IE or Firefox I can watch my docs.
Someone can help me with the error? I forget to install something?

Many thanks to all.