What was language of your ancestor? Any success locating the arrival manifest on this ancestor? By any chance the ancestor was naturalized citizen, had social security numbers?You need to find a precise place of birth.I'm sure you know that in 1993 Czechoslovakia separated into Czech Republic and Slovak Republic.
Is it possible the surname is KRAJCIR and not KRAJCER? Please take a look in www.ellisislandrecords.org Maybe you can find your ancestor's arrival manifest.