Excel 2007 vba Worksheet_Change not updating from dropdown Cell link -

i have vba code in excel 2007 (also needs work in 365).

private sub worksheet_change(byval target range)      if target.address = "$v$6"         msgbox "here"     end if end sub 

if cell v6 manually changed (e.g. key in number) msgbox displayed. when dropdown updates cell msgbox not displayed. can't see how dropdown updating different.