if all these answers are 'yes' then i will make you an example mission...
1. Have you named the chopper correctly?
2. Have you named the leader of the group?
3. Have you saved the script into you mission folder as
parachute.sqs AND as an
.sqs file?
3. Have you written
[groupleadername, choppername] exec "parachute.sqs" in the on activation field of a trigger or a waypoint of the
chopper?
4. Are the men in a seperate group from the chopper and are
moveincargo into the chopper?
5. Have you tried to place a hovering chopper with the men in and execute the script using a trigger that is called by radio Bravo?
hopefull the problem will be found after those questions.