[PROBLEM] Using webdav (https)

[liveo]

Software
XBian version:1.0
XBMC version: the latest
Overclock settings:High

Hardware
Power supply rating: Don't know, but is connected through wall outlet
RPi model (model A/B 256mb/512mb):Model B
SD card size and make/type:Kingston 8gb class 10
Network (wireless or LAN): LAN
Connected devices (TV, USB, network storage, etc.):TV

Logile
Link to logfile(s):

Problem description:
I am trying to stream from my nas to my gf's house through webdavs(https). I can add the source and it will add all my files and add them to my library. However, when i try to play a file, it will just keep saying "working" and nothing happens. Eventually i have to unplug the pi and restart. I can sftp to my nas through the pi, however i don't like this solution since there is a lot of lag/buffering and generally not a good way to stream. If i try running xbmc on my pc, it works fine through webdav.
Nas is on a 40/40 connection, and the pi is on a 20/5 connection, both are wired.
How to reproduce:
Add webdav(https) source, and add to library. Try to play a file.


Any help or suggestions to other way of streaming encrypted to the pi, is much appreciated.
thanks.