Copay, NVOS Issues

Hi. I took part in the Nvo crowdsale and now I want to import my Copay wallet with my NVOS. I received my private key with the help of this tutorial. I entered the private key at Counterparty and clickes sweep but nothing happened, then I realised that there are 2 private keys on called walletPrivKey and the other one xPrivKey. I tried the first one first but nothing happend so I tried the second one but it it said that this was not an valid key. I just had a very small amount of btc in my wallet so sent some more to pay for possible fees or whatever but still nothing happens. I hope you can help me soon with my problem