ADG726 used in differential mode

Hello,

 We are having troubles with MUX ADG726 that we use to multiplex pairs of signals. Wiring is this one :

 

 

 Regarding this extract of the truth table, we should have both SxxA to DA and SxxB to DB at the same time depending on A0 to A3. But we only get SxxA on DA and nothing on DB.

 

 

 Is there something we are misunderstanding in the datasheet ? Thank you for helping us. 

 

Best regards,