Red Alert 3 Uprising installation issue

Hi

I just dowloaded a redeemed code for Red Alert 3 Uprising in Origin. I downloaded the game and when I try to INSTALL it, I get a message asking me to put the CD/DVD of the game in the drive C:.

I dont have the CD or DVD because I bouth the game for download, and I dont have the cd/dvd of the game.

I'll look forward your return.

Thanks.