Lighting Build Failed....Please help

[ryanjon2040]

I made a map in UDK but cant build the LightMass. When i click on Build light with LightMass checked, it says "Lighting Build Failed. See log for more information". Anyone know how to fix it. Here is the log from SwarmAgent.

5:40:36 PM: [Interface:TryOpenConnection] Local connection established
5:40:36 PM: [Job] Accepted Job 57B49B9E-42943986-205537B4-356A5C13
5:40:39 PM: [Job] Launched Job UnrealLightmass_2011-11-22_19-56-43_982296-64bit.exe
5:40:39 PM: [Job]     PID is 5152
5:40:39 PM: [Job]     GUID is "57B49B9E-42943986-205537B4-356A5C13"
5:40:39 PM: Log file created: UnrealLightmass_RYANJON2040-PC_A6A67786405C054D1528CDB4EA22DB70.log
5:40:39 PM: Lightmass WIN64 started on: RYANJON2040-PC. Command-line: "G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe" 57B49B9E42943986205537B4356A5C13 -trisperleaf 4
5:40:39 PM: Processing scene GUID: 57B49B9E42943986205537B4356A5C13 with 4 threads
5:40:39 PM: Building static lighting...
5:40:39 PM: [Job] Found a parent connection for PID 5152
5:40:39 PM: [Job]     2E933234 -> 2259023D
5:40:39 PM: [Interface:TryOpenConnection] Local connection established
5:40:46 PM: Measured CPU frequency: 2.65 GHz
5:40:46 PM: FStaticLightingSystem started using GKDOPMaxTrisPerLeaf: 4
5:40:46 PM: Number of texture mappings: 23691
5:40:46 PM: Number of vertex mappings:  2
5:40:46 PM: Number of terrain mappings: 5
5:40:46 PM: Number of fluid mappings:   3
5:40:46 PM: Number of landscape mappings:   0
5:40:46 PM: Number of SpeedTree mappings: 0
5:40:46 PM: Number of BSP mappings:     42
5:40:46 PM: Number of static mesh instance mappings: 23693
5:40:46 PM: Number of SpeedTree mesh instance mappings: 0
5:40:46 PM: Reserving memory for 23743 meshes, 10761467 vertices, 10016280 triangles
5:40:51 PM: Scene surface area calculated at 2118026.750 million units (33.486% of the estimated 6325046.000 million units)
5:40:51 PM: Importance volume surface area calculated at 0.000 million units (0.000% of the estimated 158.122 million units)
5:40:51 PM: Assertion failed: NewPtr || Size==0 [File:LightmassCore\Src\LMMemory.cpp] [Line: 98]
5:40:51 PM: OUT OF MEMORY:  Realloc:   2875519296 bytes (     2742.31MB)  requested,   8385610.00 of   8388608.00 MB of virtual memory free,       916.98 of      4093.76 MB of physical memory free,      2747.68 of      8456.20 MB of page file free
5:40:52 PM: Exception handled in main, crash report generated, re-throwing exception
5:40:52 PM: Exception handled in main, calling appHandleCriticalError
5:40:52 PM: === Critical error: ===
5:40:52 PM: 
5:40:52 PM: Assertion failed: NewPtr || Size==0 [File:LightmassCore\Src\LMMemory.cpp] [Line: 98]
5:40:52 PM: OUT OF MEMORY:  Realloc:   2875519296 bytes (     2742.31MB)  requested,   8385610.00 of   8388608.00 MB of virtual memory free,       916.98 of      4093.76 MB of physical memory free,      2747.68 of      8456.20 MB of page file freeRaiseException() Address = 0xfd17cacd (filename not found) [in C:\Windows\system32\KERNELBASE.dll]
5:40:52 PM: 
5:40:52 PM: CxxThrowException() Address = 0x721f14f1 (filename not found) [in C:\Windows\system32\MSVCR100.dll]
5:40:52 PM: 
5:40:52 PM: Address = 0x40055941 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x4005615f (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x40053656 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x4000db1b (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x40050334 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x40048cdd (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x4008da33 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x40064618 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x40064731 (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0x4002e25a (filename not found) [in G:\UDK\UDK-2011-11\Binaries\SwarmCache\Jobs\Job-57B49B9E-42943986-205537B4-356A5C13\UnrealLightmass.exe]
5:40:52 PM: 
5:40:52 PM: Address = 0xef8d17c7 (filename not found) [in C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll]
5:40:52 PM: 
5:40:52 PM: Address = 0x171bd4   (filename not found) 
5:40:52 PM: 
5:40:52 PM: Address = 0x171bd4   (filename not found) 
5:40:52 PM: 
5:40:52 PM: 
5:40:52 PM: CreateProc AutoReporter.exe "UE3AutoReportDump.txt" "UnrealLightmass_RYANJON2040-PC_A6A67786405C054D1528CDB4EA22DB70.log" "UE3AutoReportIniDump.txt" "UnrealLightmass.exe-2011.12.05-17.40.51.dmp" -unattended
5:40:52 PM: Couldn't start up the Auto Reporting process!
5:40:52 PM: *** CRITICAL ERROR! Machine: RYANJON2040-PC
5:40:52 PM: *** CRITICAL ERROR! Logfile: UnrealLightmass_RYANJON2040-PC_A6A67786405C054D1528CDB4EA22DB70.log
5:40:52 PM: *** CRITICAL ERROR! Crash report: 
5:40:52 PM: [CloseConnection] Closing connection 2259023D using handle 2259023D
5:40:52 PM: [CloseConnection] Connection confirmed for disconnection 2259023D
5:40:52 PM: [CloseConnection] Connection disconnected 2259023D
5:40:52 PM: [GetMessage] Safely returning to 2259023D with no message
5:40:52 PM: [MaintainConnections] Local connection has closed (2259023D)
5:40:52 PM: [MaintainConnections] Removed connection 2259023D
5:40:52 PM: [Job] Job has failed! Job executable didn't exit cleanly. Exit code: 1
5:40:59 PM: [CloseConnection] Closing connection 2E933234 using handle 2E933234
5:40:59 PM: [CloseConnection] Connection confirmed for disconnection 2E933234
5:40:59 PM: [CloseConnection] Closing orphaned Job (57B49B9E-42943986-205537B4-356A5C13)
5:40:59 PM: [CloseConnection] Connection disconnected 2E933234
5:40:59 PM: [GetMessage] Safely returning to 2E933234 with no message
5:41:00 PM: [MaintainConnections] Local connection has closed (2E933234)
5:41:00 PM: [MaintainConnections] Removed connection 2E933234
5:41:00 PM: [MaintainConnections] All connections have closed

My UDK version: UDK November Build 2011
System Specs:

Core 2 Quad Q6700
4GB Corsair XMS2 DDR2 800 Mhz RAM
Nvidia 9600GT
Windows 7 x64 SP1