Can't use TAS Input dialog box

I've been using Dolphin's frame advance to test frame data in Project M, but I can't use the TAS Input dialog boxes found under Emulation->TAS Input to input anything at all. But I can use my controller with frame advance just fine. I want to use more precise inputs and be able to use multiple controllers at once which is what I want the dialog box for. It doesn't matter what I do with the dialog box, the game just doesn't seem to register the inputs. I attached the dialog boxes to show exactly what I'm referring to. Can anyone help me get the dialog boxes to work?

Dolphin version: 4.0-648 x64
OS: Windows 7
Processor: Intel® Core™ i7 CPU 870 @ 2.93GHz
Video card: NVIDIA GeForce GT 320
RAM: 8GB

  Untitled.png (Size: 164.71 KB / Downloads: 9)

  Untitled2.png (Size: 69.54 KB / Downloads: 13)