Automatic reschedule activity date when shift another activity

Hi Gurus,

I have trouble about shifting activity, i try to imitate function ms.project automatic reschedule.

Act                       Start                    Finish

Activity10             02.11.2015           03.11.2015

Activity20             04.11.2015           05.11.2015

Relation between activity FS, Activity 20 as successor.

I try to extend finish date activity10 through CJ2B to 10.11.2015.

why activity20 did not reschedule to 11.11.2015(Start)  12.11.2015(Finish)?

please can someone help me to give me solution, what should i do?

best regards,

michael a