Ci 1 recording with Audacity no microphone

The Ci 1 will not pick up my microphone when recording with Audacity 64bit. Prior to this it was working fine. Settings are Hi-Z/off; Mono/on; Phantom/on; mic line in 1/L; USB headphones.

Began recording new mono track with music on separate mono track. No sound was being recorded from the microphone. All equipment is the same when using Audacity 32bit software.

Any suggestions would be much appreciated.