Cubase and Focusrite Scarlett 6i6

Hi,
I has recently downloaded Audacity in my Windows 7 (old version, yes) and I can’t configurate (doesn’t works) with my external sound cart Focusrite 6i6.

I would like to record one flux audio from internet and after treat this audio file in Cubase 7.

I readed a lot of sites but it doesn’t work.

Can you explained to me how to configurate both Audacity and Focusrite ?

Thanks a lot ! Best regards, Julian