how to setup usb mass storage disk in qnx6.1.0?

I have a usb mass storage disk about 32M can be
auto-use in win2000.But in qnx system ,I don’t know how to setup it.
After I make the Utilitie “devu-uhci &” running .
I use the command “usb -vvv”,I can see some info about the mass storage
the info:

usb -vvv

USB (UHCI) v1.10, v1.01 DDK
Control, Interrupt, Bulk, Isoch, Low speed, High speed

Device Address : 1
Vendor : 0x1065 (CCYU TECHNOLOGY)
Product : 0x2136 (EasyDisk Portable Device)
Device Release : r0.01
USB Spec Release : v1.10
Serial Number : 20320870
Class : 0x00 (Independant per interface)
Max PacketSize0 : 64
Languages : 0x0409 (English)
Current Frame : 458 (1024 bytes)
Configurations : 1
Configuration : 1
Attributes : 0xc0 (Self-powered)
Max Power : 0 mA
Interfaces : 1
Interface : 0 / 0
Class : 0x08 (Mass Storage)
Subclass : 0x06 (SCSI)
Protocol : 0x50
Endpoints : Control + 2
Endpoint : 0
Attributes : Control
Max Packet Size: 64
Endpoint : 2
Attributes : Bulk/IN
Max Packet Size: 64
Endpoint : 2
Attributes : Bulk/OUT
Max Packet Size: 64

Then I use command “mount -t dos /dev/usb /fs/usb_disk”,but it display
the error message:

mount -t dos /dev/usb /fs/usb_disk

mount: Can’t mount /fs/usb_disk (type dos)
mount: Possible reason: No such device or address

I don’t know how to mount it as harddisk in /fs/ directory and use it to
storage data.