Can't record audio

I need help with my mixer (Alesis MultiMix 8 USB 2.0) on Windows 7. I have drivers installed and the OS sees the device. When I go to record audio on Audacity, it doesn't record audio.

When I go to the sound settings in Windows under recording devices, it shows up as "Line-in, Alesis USB Audio -WDM 2.9.64) and the levels aren't showing any movement when audio is going through the mixer.

I'm using a Dell Inspiron 15r 5520 with USB 3.0, the mixer is connected to a USB 2.0 hub.

Thanks for the help.
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