Complaint Review: USBID-modeswitch ZTE

Problem in switching the ID for the USB port using the ZTE631.  I need to run usbid modeswitch on an ARM based embedded device.
Where I installed usbid modeswitch-1.1.9-jimsh.tar.bz2 along with the usbid modeswitch-data package.

Now when, I put my dongle (ZTE631 Modem), it fails to switch.   I can't get help from phone in customer support so I'm posting this online for help. Changing the ID on my USB port is not working.

I have enabled log, which looks like:
Code:
USBID ModeSwitch log from Thu Aug  18 12:26:18 UTC 2011

Raw args from udev: 1-1:1.0/1-1:1.0 {}

Using global config file: /etc/usbid_modeswitch.conf
----------------
USBID values from sysfs:
  manufacturer   ZTE,Incorporated
  product   ZTE WCDMA Technologies MSM
  serial   MF6310ZTED010000
----------------
bNumConfigurations is 1 - don't check for active configuration
SCSI attributes not needed, moving on
checking config: /usr/share/usbid_modeswitch/19d2:2000
! matched, now switching
 (running command: /usr/sbin/usbid_modeswitch -I -W -c /usr/share/usbid_modeswitch/19d2:2000)

Verbose debug output of usb_modeswitch and libusb follows
(Note that some USB errors are expected in the process)
--------------------------------

Reading config file: /usr/share/usbid_modeswitch/19d2:2000

 * usbid modeswitch: handle USBID devices with multiple modes
 * Version 1.1.9 (C) Josua Dietze 2011
 * Based on libusb0 (0.1.12 and above)

 ! PLEASE REPORT NEW CONFIGURATIONS !
InquireDevice disabled
Success check enabled, max. wait time 20 seconds
System integration mode enabled


Looking for target devices ...
  searching devices, found USBID 0000:0000
  searching devices, found USBID 19d2:2000
   found matching vendor ID
  searching devices, found USBID 0424:2514
  searching devices, found USBID 0000:0000
 No devices in target mode or class found
Looking for default devices ...
  searching devices, found USBID 0000:0000
  searching devices, found USBID 19d2:2000
   found matching vendor ID
   found matching product ID
   adding device
  searching devices, found USBID 0424:2514
  searching devices, found USBID 0000:0000
 Found devices in default mode, class or configuration (1)
Accessing device 007 on bus 001 ...
Skipping the check for the current configuration
Using endpoints 0x01 (out) and 0x81 (in) 
 No new devices in target mode or class found

Mode switch has failed. Bye.

fail:
--------------------------------
(end of usbid_modeswitch output)


Somebody please help me why this failure comes?
I tried manually too, usbid_modeswitch -c /usr/share/usbid_modeswitch/19d2:2000 also with same result.

Any help would be appreciated. Thanks in advance

NOTE: my device target product id is 2003 which is not present in TargetProductList of config file. Is it the cause? if so, what shall I add to support my device? I have tried adding 2003 in TargetProductList also, but with same result.