VIPRION Failover configuration

Hi,

i connected a trunk between two Viprion 2400's with one blade each one, and we try to test the failover configuration (in both vguest) but at the moment that we disconnect the trunk from the active device ( in this trunk pass the HA and the services), dont change the state to standby,

Could someone help to show me if the configuration has some error or is necesary to do an extra step to make the logical failover.

Regards

Efrain