Flash media Encoder can't set FPS

hi friends,
I have setup a live streaming using flash media encoder. I had a sony dv deck which is connected to the 4 pin firewire port .Flash media encoder detects the device as"Microsoft Dv and vcr " .it works fine... but i had a problem wit FrameRate. I can't adjust the framerate. as it shows only 25.. Please help me to adjust it, as the net is slow to stream the video. so pls help me to find a solution

regards