Blue screen on surprise removal

Hi All
here i'm working on USB camera device and an streaming application which can
capture Video data.
Now the problem is,while i'm running the streaming application and unplug
the usb cable(surprice removal) after sometime the system crashes.

problem 1:
here is the snap shot of my dumpfile

MODULE_NAME: nt



FAULTING_MODULE: 804d7000 nt



DEBUG_FLR_IMAGE_TIMESTAMP: 41107b0d



READ_ADDRESS: unable to get nt!MmSpecialPoolStart

unable to get nt!MmSpecialPoolEnd

unable to get nt!MmPoolCodeStart

unable to get nt!MmPoolCodeEnd

01580137



CURRENT_IRQL: 2



FAULTING_IP:

nt!ExUnregisterCallback+a2

805363c6 8b51e0 mov edx,[ecx-0x20]



DEFAULT_BUCKET_ID: DRIVER_FAULT



BUGCHECK_STR: 0xA



LAST_CONTROL_TRANSFER: from 805363c6 to 805436d0



STACK_TEXT:

WARNING: Stack unwind information not available. Following frames may be
wrong.

f88ebca8 805363c6 badb0d00 000000dc 00000000 nt!Kei386EoiHelper+0x2834

f88ebd2c 80536988 80563b50 80563b48 8053ef53 nt!ExUnregisterCallback+0xa2

f88ebdac 805ce794 00000000 00000000 00000000
nt!ExDeletePagedLookasideList+0x82

f88ebddc 805450ce 8053eec6 00000000 00000000
nt!PsRemoveCreateThreadNotifyRoutine+0x214

00000000 00000000 00000000 00000000 00000000 nt!KiDispatchInterrupt+0x72e





STACK_COMMAND: .bugcheck ; kb



FOLLOWUP_NAME: MachineOwner



BUCKET_ID: WRONG_SYMBOLS



Followup: MachineOwner

---------


what could be the problem.......

problem 2:

here i'm using winxp DDK command prompt to build my driver ...(thats on my
pc) and i have a target pc also wher i load the entire folder of the
binaries
which contains the driver file .sys and .pdb files,
I run the windbg tool ,Kernel debugger ,to the symbol file path i had given
the location of this copied folder ... but during loading of the module (i.e
my driver ) the symbol file for this driver is not getting loaded (.pdb)
what could be the problem


regards
raj