RB2011 Not see USB Port

I have RB2011 (v6.11) with USB MODEM 3G “ZTE M821D”
When i connect the modem and reboot then routerboard i see it in “Resources”-“USB”
Device: 1:2 Vendor:ZTE:Incorporated ect.
BUT
I not see nothing in the interface list and in “PPP Client” i see only “serial” port.

Thanks

Is the 3g modem compatible with the routerboard?
http://wiki.mikrotik.com/wiki/Supported_Hardware

No.
The USB modem not in list
but
i try to set usb-mode=force-host
and now i see usb port and the interface ppp-out1
and it work
THANK YOU

Great, goodluck