Cannot connect to burp server

Hi,

I installed burp on a dedicated server, where it runs properly.

---

mathieu@burp-server:~$ netstat -lnp

[...]
tcp6 0 0 :::4971 :::* LISTEN -
tcp6 0 0 ::1:4972 :::* LISTEN -
[...]

---

I installed burp-ui on my laptop, and configured it with the following parameters

---

mathieu@mnvaio:~$ cat /usr/local/share/burpui/etc/burpui.cfg

[...]

port: 5000

bind: ::

bport: 4972

bhost: ip_address_of_burp_server_host (ipv4)

[...]

---

But despites my efforts, i always get the same message when connecting to the webpage of burp-ui : " Cannot contact burp server at 127.0.0.1:4972 "

Is there any reason that burp doesn't connect to the server? Did I misconfigured burp-ui?

I tried to disable ipv6 on my burp server, but then burp just refuses to start.

Burp server : ubuntu-server 12.04 up-to-date, dedicated to burp

Burp-ui station : debian sid up-to-date ( also tried burp-ui on a dedicated ubuntu-server 12.04, also up-to-date )