Multipoint Server 2012 / SSD incompatibility ??

Hello, 

to define our environment, we use a MS6200 From HP + 9 zero client T150 from HP.

We were using WMS2011 Premium without problem and we decided to pass to the new WMS2012.

all was working fine until we decided to use WMS2012 with SSD Drive.

For information we use sasmung 840 evo 120gb model : MZ-7TE120

All stations are detected in the manager but we have no display.

We made fresh install on the SSD, but also a clone of the HDD wich was working correctly.

Same issue, no display on the T150; sometimes 1 zero client is working, but after reboot same issue.

Any idea ?