My 3G HSDPA Device Dissappear in device manager

Hi all
I buy a laptop with built in 3G HSDPA Adapter
My Adapter Model is "Sierra Wireless MC8775"
When I hibenate my laptop and power up it again my device dose not
appear in device manager.
I search for new hardware in control pannel but noting found
if I gose my laptop to standby and reback it from standby my vista
detect my device and added it to device manager
my first Question : do you know a command to search for disconnected
usb device and reconnect them?(something happend when vista come back
from stand by).
Second Question : is there any way to solve this problem.
Please notice that
my device is an internal USB device.
I disable USB Selective suspend in all power management plan.
my laptop model is Asus V2S Serries
and my os is Vista Ultimate

Thank you in advance