[Bluez-users] Problem building a piconet with pand

Hi,

I'm actually working on a project where I need embedded devices to 
communicate between them. We decided to use bluetooth dongles and pan to 
build a piconet.
Actually this work fine when we have only 3 devices : 1 GN & 2 PANU 
(PANU#1 & PANU#2). When we try to add a third PANU (PANU#3), pand say 
the host is down. If I shut down the connection of one of the two thers 
PANU, I'm able to establish a connection with PANU#3 to the GN. I try to 
setup a different GN on a linux desktop, same result, 1 GN & 2 PANU.

*On my server I do this : *
/pand --listen --nosdp --role GN -i /yy:yy:yy:yy:yy:yy
I use brctl on the GN to bridge the interface

*On my clients I do this :*
/pand --nodetach -i xx:xx:xx:xx:xx:xx --role PANU --connect 
/yy:yy:yy:yy:yy:yy

On connected PANU i have :
pand[7334]: Bluetooth PAN daemon version 2.25
pand[7334]: Connecting to yy:yy:yy:yy:yy:yy
pand[7334]: bnep0 connected

On PANU's I can't connect:
pand[8492]: Bluetooth PAN daemon version 2.25
pand[8492]: Connecting to yy:yy:yy:yy:yy:yy
pand[8492]: Connect to yy:yy:yy:yy:yy:yy failed. Host is down(112)


I have read & reread the HOWTO-PAN. I mainly used it to setup my pan.
I know there is a limitation of 7 PANU max but there I'm far away of the 
7 devices. Is there is something I have forgotten ? misconfigured  ... ? 
A problem with my dongles ?
If anyone could help me

Laurent