I am a total newbie. Just bought a Nano ledger and transferred my alts from an exchange onto it. I want to advance towards purchasing some of the smaller coins from Forkdelta. However when I plug my nano ledger in, the website reads my ETH amount as 0. I do have ETH on my ledger but forkdelta cant read the amount even though it reads that my ledger is plugged in. Any advice on what is going on would be appreciated.