[Edit:    I did not notice there was two tabs from within the page, one for BTC and the other for BCC]
I have been mining in pool.bitcoin.net and after switching from BTC to BCC i have not seen the previous due payment (BTC).

I switched back just to see if it is linked to what i am mining but it is still not updating after halve an hour.
Does thins mean that previously mined BTC is gone? So that switching have to be done after withdrawing all earned coins?