vlookup not update when requests data from another tab

vlookup not update when requests data from another tab


I modify the source tab, but the destinations using, vlookup  not update.
I need click cell by cell and press enter  (f9 not works).

Have any global command to refresh all page?
It is my cell:
=IF(ISNA(VLOOKUP( $B43 ; QS_AUGUST_2016_AIR.$C$4:$S374 ;8;FALSE)); "" ;VLOOKUP( $B43 ; QS_AUGUST_2016_AIR.$C$4:$S374 ;8;FALSE))