MV Pipe Source in Adobe Flash Encoder 3.0

[Vermut]

I'm trying to use MV Pipe in Adobe Flash Encoder 3.0. My source is simple USB Webcam. When I choose "USB Webcam" as source for flash encoder, it works fine on standart 640x480@30fps.

But when I create a simple graph "USB Webcam" -> "MV Pipe Renderer" and then choose MV Pipe Source in Adobe Flash Encoder 3.0, it doesn't work. Says "video device does not support this framerate or size". Rendering "MV Pipe Renderer" in another copy of MV studio works fine.

Will supply any debug information. Please help.