[Hollako]

Plz can anybody tell me how i can download a firmware to a Sunplus (SPMP3052A) MP4 processor?
i have the tool (FRM pro) and i have the folders of downloads (A and B with the .bin file) and i made well all the steps but the main problem is when i push the ISP button in the FRM pro a message will appear on the log window "No device detected"

So i have to know wich button should i push to enter the "Sunplus USB mode" and then the device able to be detected?

N.B.:I have another MP4 with Rockship processor its so easy to download the firmware by pressing the "Menu" button then by plugged in the USB cable and i enter the "Rockship USB mode" and i download the firmware successfully.