Word. It doesn't matter whether you got it from the official site or not, there is still a chance that the data didn't transmit or write properly. Its happened to me before, and depending on your internet speed it might be worth redownloading it to check and/or validating it against the md5. Its always worth it when dealing with critical files. But then I remembered you said it didnt pick up your card, so it wont be anything to do with the download.

This program is designed to write a raw disk image to removable SD or USB flash devices or backup these devices to a raw image file. It is very useful for embedded development, namely Arm development projects (Android, Ubuntu on Arm, etc). Writes a raw disk image to a removable device or backup a removable device to a raw image file. It is very useful for embedded development, namely Arm development projects (Android, Ubuntu on Arm, etc). It can also be user to write Linux distributions installer images to USB d.

Have you tested the card in a digital camera or something to make sure the card isn't dead?