Controlling flv with custom buttons

Greetings.

I have created a presentation which is mostly graphics and voiceover. I have created a few custom buttons to allow the user to pause, start over, etc. (not video). In a few places I am calling to external flv files which have been placed inside movieclips. I want to be use my custom pause button to pause the flv as well, as opposed to using a flv player/controller. I have made several attempts such as:

_on (release) {
_root.myvideo_mc.pause();
}

or also giving the flv an instance name as well within the mc…

_on (release) {
_root.myvideo_mc.video1.pause();
}

and trying stop/play instead of pause, etc…all to no avail. Can anyone help with the appropriate scripting to control an flv with a custom button?

Thanks in advance!