highlihting an english word that will hightlight the corresponding greek word

i am using 2 windows for bibles: NAS95 and BHS or NA27 depending if i am in OT or NT.

if i highlight an OT word in NAS it will show up highlighted in BHS and vise vera.

if i highlight an NT in NA27 it will show up highlighted in NAS

however, if i highlight a word in the NT in NAS it will NOT highlight the word in NA27.

is there a setting that i need to change?

thanks

howward silverman