How do you mute a video on Windows movie maker?

I want to first make it mute, then make it over again with pictures and music.. But I cant make it mute, and add the music. The conversation comes out, and also the music. So i need to mute it first then do it over again with music,, Is that possible...

I can't find where I can mute a video clip to put music over it ;( I have the song already on the clip, but I need to mute the clip first :/ SOMEONE HELP?! Thanks :)

I need to keep my music playing but i don't want the sound of the video to overlap the music. How do i mute the video?

okayy soo i wanna mute the video clips but i have a song under autio and i want that song to play while the video has no sound... any setings or whatever that i have to click,??> HELPPP

I don't want the sound on video clips, but it's nearly immposible to tape without sound. How can I just mute certain clips, so that you only hear the backgrounf music?

I don't know if I have a new version or whatever, but all the other answers say to hit a (+) sign next to my video, but there's nothing like that. Does anyone know how to mute some clips? ):

I have a video clip and I want to mute some of the sounds, but not the whole clip; how will I do that with wmm? THanks!

I don't want the sound on video clips, but it's nearly immposible to tape without sound. How can I just mute certain clips, so that you only hear the backgrounf music?

im making a video on it and i cant seem to find this out.