Problems With the High Availability

Hi all,
First of all, i'm sorry for my "bad" english, but i will to try to explain my problem as clairly as i can.
I'm using VDI 3.1.1 ,a configuration "High Availability with bundled MySQL" with a primary server and 2 secondary servers.
i'm trying to test the HA for the core VDI and FailOver for the VirtualBox, The HA works but i think with a timeout (=2minutes) that i want to reduce.
I found some troubles with the VirtualBox failover.
Here is more explaination :
These Tests are done with the VRDP mode.
The first test after the installation&configuration, the failover works fine after the crash of server A, the desktops migrate and restart in the other server (the server B)
The second test : i reboot the server A, and i want to test again with shuting down the server B (crash). the desktops migrate to the server A and they are with the state "running" but SRS can't deport the display (it loops on the authentication screen) ... The VM is running and i can access to it with the Remote Desktop Connection.
When i looked to the logs, i found that the SRS is always looking for the VM on the server who crashed (Server B). I looked to the vda-client command for the user concerned and it shows me that the host is the server who crashed (Server B) with the old port. I opened the MySQL,vda database and i looked the datas on the t_desktop* table, the fields* ip-or-dns* and port *were not updated when the VMs migrates. i update the two fields with an update request with the correct host (of the server A) and the new port where the VM has migrate, and the display comes in 1s.
So, the VM migrate well, but Datas on MySQL Database were not updated.
For the WRDP mode, everything works fine, because the SRS uses the IP of the VM to deport the display, not the host and port like in VRDP mode.
I test this with different configuration :
* HA with bundled Mysql : primary server and two secondary servers. The two secondary servers contains the VDI core and the VirtualBoxes.
* HA with bundled Mysql : the 3 vdi Cores are virtualized on a server, and Two Servers with only the VirtualBoxes.
* One Server with VDI Core, and Two Servers with only the VirtualBoxes to test only the failover of virtualbox.
All of this tests gave the same results.
My questions :
1 - After a crash of a server and after reboot, is there anything to do? (i checked all the vda services "database,webservices ..." and everything is ok after the reboot).
2 - Is there a bug for the HA with the VRDP mode?
3 - Is anybody had the same problems? if yes, what is the solution?
4 - How can i reduce the timeout for the HA of VDI Core? is there any process for that?
Thank you all for your help , and again sorry for my bad english, i know i have to improve it :)

I am using VDI version 3.2. Virtualization layer is Virtuabl Box.
setup is 1 x VDI server, 2 x virtual box host , remote mysql database and shared storage backend i.e NAS
The Virtualbox session / vm does not fail over, period !
When i pull the plug on the 1st Virtualbox, all the desktops session on the down server, remains on the server
and did not failover to the other one.
Seriously , have any one managed to get the HA working ? anyone ?
see below for the cli output.
Started 1 desktop
root@vdihost-a:~[598]# vda provider-list-hosts virtualbox
NAME             STATUS  ENABLED         CPU_USAGE      MEMORY_USAGE  DESKTOPS
vdi1              OK  Enabled       0% (20 MHz)      10% (1.8 GB)         0
vdi2               OK  Enabled      1% (310 MHz)      16% (2.6 GB)         1
Started 2nd desktop
root@vdihost-a:~[599]# vda provider-list-hosts virtualbox
NAME             STATUS  ENABLED         CPU_USAGE      MEMORY_USAGE  DESKTOPS
vdi1             OK  Enabled      1% (319 MHz)      17% (2.9 GB)         1
vdi2               OK  Enabled      1% (327 MHz)      16% (2.6 GB)         1
AfterpPower cut to vdi2, but second desktop did not failover to vdi2, desktops count still 1, instead of 2
root@vdihost-a:~[600]# vda provider-list-hosts virtualbox
NAME              STATUS  ENABLED         CPU_USAGE      MEMORY_USAGE  DESKTOPS
vdi1               OK  Enabled      0% (140 MHz)      17% (2.9 GB)         1
vdi2     Unresponsive  Enabled        0% (0 MHz)         0% (0 KB)         1
I really want to know if anyone has managed to get this working at all.

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