BSOD Bugcheck String: 0x000000c2 (0x00000007, 0x0000121a, 0x00000000, 0x8bde5818)

My server seems to reboot occasionally during veritas backup exec 11d backups.  Attached is the minidump.  Any help would be much appreciated.  Thank you.  Allan
Microsoft (R) Windows Debugger Version 6.9.0003.113 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Documents and Settings\allan.NWMNS\Desktop\Minidump\MEMORY.DMP]
Kernel Summary Dump File: Only kernel address space is available

Symbol search path is: SRV*DownstreamStore*http://msdl.microsoft.com/download/symbols
Executable search path is:
Windows Server 2003 Kernel Version 3790 (Service Pack 2) MP (8 procs) Free x86 compatible
Product: LanManNt, suite: SmallBusiness TerminalServer SmallBusinessRestricted SingleUserTS
Built by: 3790.srv03_sp2_gdr.070304-2240
Kernel base = 0x80800000 PsLoadedModuleList = 0x808a6ea8
Debug session time: Tue May 20 15:10:01.733 2008 (GMT-6)
System Uptime: 0 days 10:56:14.463
Loading Kernel Symbols
..............................................................................................................................
Loading User Symbols

Loading unloaded module list
.......
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*                        Bugcheck Analysis                                    *
*                                                                             *
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Use !analyze -v to get detailed debugging information.

BugCheck C2, {7, 121a, 0, 8bde5818}

*** ERROR: Module load completed but symbols could not be loaded for naveng.sys
*** ERROR: Module load completed but symbols could not be loaded for navex15.sys
*** ERROR: Module load completed but symbols could not be loaded for EraserUtilRebootDrv.sys
*** ERROR: Module load completed but symbols could not be loaded for eeCtrl.sys
*** ERROR: Module load completed but symbols could not be loaded for SPBBCDrv.sys
*** ERROR: Module load completed but symbols could not be loaded for VirtFile.sys
*** ERROR: Module load completed but symbols could not be loaded for Savrtpel.sys
*** ERROR: Module load completed but symbols could not be loaded for SYMEVENT.SYS
*** ERROR: Module load completed but symbols could not be loaded for savrt.sys
*** ERROR: Module load completed but symbols could not be loaded for ati2mtag.sys
*** ERROR: Module load completed but symbols could not be loaded for e1e5132.sys
*** ERROR: Module load completed but symbols could not be loaded for scsichng.sys
*** ERROR: Module load completed but symbols could not be loaded for awlegacy.sys
*** ERROR: Module load completed but symbols could not be loaded for aw_host5.sys
*** ERROR: Module load completed but symbols could not be loaded for NTCMBASE.SYS
*** WARNING: Unable to verify timestamp for ati2dvag.dll
*** ERROR: Module load completed but symbols could not be loaded for ati2dvag.dll
*** WARNING: Unable to verify timestamp for ati2cqag.dll
*** ERROR: Module load completed but symbols could not be loaded for ati2cqag.dll
*** WARNING: Unable to verify timestamp for atikvmag.dll
*** ERROR: Module load completed but symbols could not be loaded for atikvmag.dll
*** WARNING: Unable to verify timestamp for vncdrv.dll
*** ERROR: Module load completed but symbols could not be loaded for vncdrv.dll
*** WARNING: Unable to verify timestamp for vnchelp.dll
*** ERROR: Module load completed but symbols could not be loaded for vnchelp.dll
*** WARNING: Unable to verify timestamp for ATMFD.DLL
*** ERROR: Module load completed but symbols could not be loaded for ATMFD.DLL
*** ERROR: Module load completed but symbols could not be loaded for ulsata2.sys
*** ERROR: Module load completed but symbols could not be loaded for msas2k3.sys
*** ERROR: Module load completed but symbols could not be loaded for vsp.sys
*** ERROR: Module load completed but symbols could not be loaded for bb-run.sys
*** ERROR: Module load completed but symbols could not be loaded for ioatdma.sys
*** ERROR: Module load completed but symbols could not be loaded for dump_msas2k3.sys
*** ERROR: Module load completed but symbols could not be loaded for DontGo.sys
*** ERROR: Module load completed but symbols could not be loaded for Gernuwa.sys
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for vncdrv.sys -
*** ERROR: Module load completed but symbols could not be loaded for awechomd.sys
*** ERROR: Module load completed but symbols could not be loaded for vnccom.SYS
Probably caused by : ntkrpamp.exe ( nt!ExFreePoolWithTag+477 )

Followup: MachineOwner
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5: kd> !analyze -v
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*                        Bugcheck Analysis                                    *
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BAD_POOL_CALLER (c2)
The current thread is making a bad pool request.  Typically this is at a bad IRQL level or double freeing the same allocation, etc.
Arguments:
Arg1: 00000007, Attempt to free pool which was already freed
Arg2: 0000121a, (reserved)
Arg3: 00000000, Memory contents of the pool block
Arg4: 8bde5818, Address of the block of pool being deallocated

Debugging Details:
------------------


POOL_ADDRESS:  8bde5818 Nonpaged pool

BUGCHECK_STR:  0xc2_7

DEFAULT_BUCKET_ID:  DRIVER_FAULT

PROCESS_NAME:  System

CURRENT_IRQL:  0

LAST_CONTROL_TRANSFER:  from 808927bb to 80827c63

STACK_TEXT:  
f791ac7c 808927bb 000000c2 00000007 0000121a nt!KeBugCheckEx+0x1b
f791ace4 8090fadb 8bde5818 00000000 8ba41c30 nt!ExFreePoolWithTag+0x477
f791ad00 808f945b 8bde5818 00000000 f791ad2c nt!IopDestroyDeviceNode+0x171
f791ad10 80933914 8ba41c58 80a5bf00 8ba41c40 nt!IopDeleteDevice+0x17
f791ad2c 8086c955 8ba41c58 00000000 e15ab358 nt!ObpRemoveObjectRoutine+0xdc
f791ad4c 80918b50 8bd773f0 88c9acc8 00000000 nt!ObfDereferenceObject+0x67
f791ad68 8090f6ba 00000000 808ae5fc 88c9acd0 nt!IopFreeRelationList+0x36
f791ad80 8088043d 88c9acc8 00000000 8bd773f0 nt!IopDelayedRemoveWorker+0x64
f791adac 80949b7c 88c9acc8 00000000 00000000 nt!ExpWorkerThread+0xeb
f791addc 8088e062 80880352 00000001 00000000 nt!PspSystemThreadStartup+0x2e
00000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x16


STACK_COMMAND:  kb

FOLLOWUP_IP:
nt!ExFreePoolWithTag+477
808927bb ff75fc          push    dword ptr [ebp-4]

SYMBOL_STACK_INDEX:  1

SYMBOL_NAME:  nt!ExFreePoolWithTag+477

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nt

IMAGE_NAME:  ntkrpamp.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  45ec0a19

FAILURE_BUCKET_ID:  0xc2_7_nt!ExFreePoolWithTag+477

BUCKET_ID:  0xc2_7_nt!ExFreePoolWithTag+477

Followup: MachineOwner
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Additional info
Exchange 2003
Symantec AV 10.1.5
Symantec Mail Security for Microsoft Exchange 5.0.5.366
Intel S5000PSL MotherBoard
Intel RAID Controller SRCSAS18E
4GB RAM
2xIntelXeon E5320@1.86GhzStart Free Trial