Weird echo in recording?

[GlitchyV2]

Hello, my name is Glitchy, and i'm a starting youtuber!
I have to say, i absolutely love Action!
It is most likely the best recording software ever

But... Today i was recording my walkthrough of Deadpool, and i noticed a weird echo in the recording!
I decided to upload it anyway, but i want to fix it as soon as possible!
Here is the video: http://www.youtube.com/watch?v=APT4VeFK3xo

Does anyone know how to fix this?

Thanks -Glitchy

[Montago]

In your audio settings you should check if you have enabled multiple inputs..

Are you using any input ports by chance ?

My x-fi onboard card will make echo if I do not mute one of the 2 input ports...