The problem with this recipe is the pineapple. Pineapples and kiwis both contain Bromelain, an enzyme that breaks down protein..... the main constituent of jell-o. This would work with other fruit, but lay off the pineapple and kiwi.
<<< Response from Kraft Kitchens Expert, Mary ~ Fresh or frozen pineapple, kiwi, papaya and guava contains an enzyme which will prevent gelatin from setting. However, if cooked or canned, these fruit may be used. >>>