Setting up a units kill resource SHOULD give the killer the reward. Make sure the units are enemies, not neutral towards each other, or you might not get the reward. But setting the kill resource in a units data should work. In fact, I have used it before successfully.
margeman2k3 posted a picture. Make sure THAT FIELD is filled out.
Worst case, if it is glitched, just add this trigger:
event- unit dies
condition- alliance check- if (owner of killing unit) is enemy of (owner of triggering unit)
if: unit type of triggering unit = zergling
then: modify player (owner of killing unit) minerals + 5
else : none
if: unit type of triggering unit = zealot
then: modify player (owner of killing unit) minerals + 15
this is more work but it will work for sure.
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