Why wont my google voice app work on my itouch?

had previously downloaded the talkatone app. It recently stopped working for me. I just downloaded the google voice app on my itouch. I have a gmail account, but for some reason, it will not sign into my account. Does anyone else have this problem or has anyone else found a solution to this problem?|||Try reinstalling the app|||It is just a technological glitch. Try reinstalling it or give it time before trying again. It should work eventually.