Can someone help me wth my problem?

I've downloaded the maemo flasher 3.5
Installed it onto my desktop AND laptop, running xp and windows 7 32bit respectively.

I've already put the zimage800mhz file into:
C:\Program Files\maemo\flasher-3.5

I then hold u, plug the usb in (showing the usb icon), and let go of u

i usually get a "problem" with a notification of the usb device getting disconnected or something in windows.

I try to open the flasher 3.5, but the command line window opens for a split second and automatically closes before I have a chance to input the command.

Is anyone familiar with this problem or know how to get around it? I've already tried it on both windows 7 32bit and xp 32bit.

HELP!