Problem with Input Device

I want to record the sound that comes out of my speakers. In Windows Xp, I choosed Stereo Mix and it worked good. But when installing the program om my Windows 7 computer, I can’t find this choice. In the manual I read that I can choose between Stereo out, Wave Out or Sum but I can’t see any of the alternatives in Audacity. I have tested all the alternatives but none works. See attachment the alternatives. What to do?

The latest version of Windows may be missing the tools you need to record internal sound or internet audio.