This sound card allows the user to control most settings from WinMLS, but some settings cannot be set from WinMLS.
This setup is set to line input (not microphone). For it to work with frequency/impulse response measurements, there must be a physical connection between input and output of channel 2.
The measurement system is corrected for. This can be turned off from Measurement→Settings.
How to set this is explained in the WinMLS help file. Search for Transit.