after putting in the private key and hitting Sweep just nothing happens.
what to do?
-snip-
This is not the place nor the time to ask this. Read through the counterparty documentation. Wait for the team to publish a guide on importing your address to counterparty and then start asking question about it (optimally through Slack). The team is trying to help the people who have improperly invested due to not ready instructions in order to make the least amount of people lose their money.
Do i need to d something extra or it will be credited automatically?
Automatically on the BTC address that you've invested with / the BTC address that you've posted in to the dashboard (if you've invested altcoins).