Q: i was trying to download a dital copy and lost conection to internet. how can i re download it as itunes tells me i have it but its not there to send to my pad??

i lost conection when down loading a dige copy of star trek into darknes.when i try and down load it again with the code in the box it wont let m. can you fix it so it will let me get my dige copy i have payed fpr from the blueray?