Audacity and IDT High Definition Audio Codec

I am using Windows 7, 64 bit and I cannot get the microphone option for IDT High Definition Audio Codec to come up as an option to select. All I see under Microphone is Micrphone (Logitech USB Headset) or (Micrpsoft Sound Mapper). How can I get the IDT to show up as a option? I have rune Lame v3.99 and Audacity under Libraries says it has detected valid FFMpeg libraries. What am I doing wrong? Thanks for any help.

Please see .