Please HELP me, please, I can't "find" my BCC...

Before the fork, I created a new BTC wallet and sent all my BTC to one address in this wallet.

You can see that here : https://blockchair.com/search?q=1923b27c25e25ce3bc124bd3650814dabf62fadfeddd87ce63de96b2fdf9008d
and here https://blockchair.com/bitcoin-cash/transaction/243276558

I exported the private key of this wallet.

After the fork, I sent my BTC to an other BTC wallet : https://blockchair.com/search?q=+16a63d95db3b1bede5383ccab3d3b0b94ef82b8ab1139dd3e467ed62abb1ac89+

As you can see, the BTC blockchain sees my Tx, but not the new BCH blockchain (normal, right ?).

So, my BCH are waiting for me on the BCH address on BCH blockchain, right ? I have the private key of this address/wallet.

On a new install of BitcoinABC with a new wallet file, I enter the command "importprivkey ............................................................." and I paste the private key instead of the dots.

The wallet scans the BCH blockchain during 1 or 2 hours.

Answer : "null"

And no BCC in balance...

Please HELP, what did I wrong, how can I access these BCH ?