Issue when mining

Hello,

Yesterday, I have install my new computer with Windows 7 64 Bit.
I have installed all of my drivers and my wallet.
I have start mine on this pool (http://etc.ethermine.org/), I was already mining on this pool on my old computer.
The software "ethminer" is working but when I check my stats on the pool website I see nothing.

My Computer:

CPU: I5 6600K
GPU: GTX 960
MOTHERBOARD: MSI Z170I PRO GAMING AC
RAM: HYPERX FURY 16GB 2666Mhz