Crashing in cave maps

For the past 2 weeks or so, I've been crashing very frequently.The thing that will always crash CoH is AE cave missions. Some times i can be inside the mission for 30 seconds and crash, sometimes up to 10 minute. This has been happening despite several changes ive made to my system. I've reinstalled windows 7 64 bit, and the biggest improvement was before any updates were applied to W7. I've also got a WinXP Pro32 bit partition on my machine, and the crashes happen in about the same amount of time. Changing the video quality and/or resolution seems to make no difference. I've also tried with 2 different video cards, an nvidia 9500gt, and my onboard ATI hd3200. This seems to make no difference either. Here is COHHelper data taken right after the latest crash.

---System information gathered by CoH Helper version 0.2.0.2---

DxDiag gathered at December 11, 2011 22:55 (-06:00)
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110622-1506)
System Manufacturer: Dell Inc.
System Model: Inspiron 519
BIOS: Default System BIOS
Central Processor: AMD Athlon(tm) Dual Core Processor 4450e (2 CPUs), ~2.3GHz
Memory: 4096MB
.Net Memory Report: 2941MB out of 4095MB available
Page File: 6820MB (1367MB currently in use)
C Drive: (SAMSUNG HD642JJ ATA Device) 558812MB out of 590377MB (94%) free
D Drive: (SAMSUNG HD642JJ ATA Device) 5627MB out of 19998MB (28%) free
E Drive: (TSSTcorp DVD+-RW TS-H653F ATA Device) zero-size drive
Windows directory location: C:\Windows
DirectX: DirectX 11
DirectX Diag version: 6.01.7601.17514 (64-bit version)

Display Notes: No problems found.
Sound Notes: No problems found.

No problems found.

No problems found.
Input Notes: No problems found.

Monitor:
Monitor's Max Resolution: (blank)
Video Device Name: NVIDIA GeForce 9500 GT
Manufacturer / Chip: NVIDIA / GeForce 9500 GT
Video Memory: 2797 MB
Driver Version: 8.17.12.8562
Driver Date: 10/15/2011 2:53:00 AM
Driver Language: English

Sound Device Description: Speakers (High Definition Audio Device)
Driver File: HdAudio.sys
Driver Version: 6.01.7601.17514
Driver Date: 11/20/2010 4:44:23 AM

Sound Device Description: Headphones (High Definition Audio Device)
Driver File: HdAudio.sys
Driver Version: 6.01.7601.17514
Driver Date: 11/20/2010 4:44:23 AM

Sound Device Description: Digital Audio (HDMI) (High Definition Audio Device)
Driver File: HdAudio.sys
Driver Version: 6.01.7601.17514
Driver Date: 11/20/2010 4:44:23 AM


WMI Information
Motherboard Manufacturer: Dell Inc.
Motherboard Model: (empty)
Motherboard Product: 0K071D
Motherboard Version: A00
BIOS Manufacturer: Dell Inc.
BIOS Name: Default System BIOS
BIOS Version: DELL - 20090219
BIOS Release: 20090219000000.000000+000


Registry Information for Current User
Resolution: 1440x900
3D Resolution: 1440x900 (Not using renderscale)
Full Screen: Yes
Maximized: No
Screen Position: 0, 0
Refresh Rate: 60Hz
Vertical Sync Enabled: Yes


Physics Quality: Medium
Maximum Particles: 50000
Max Particle Fill? 10.000
Physics Card Enabled: No


Anti-aliasing: Off
Anisotropic Filtering: 4x
Texture LOD Bias: Smooth
Water Effects: Medium quality
Bloom: 1.000 (turned on)
Depth of Field Enabled: Yes
Desaturation Effects (Sepia) Enabled: Yes
Shader Detail: High


World Texture Level: Very High
Character Texture Level: High
World Detail Level (Vis_Scale): 1.000
Entity Detail Level: 1.000
Shadows Enabled: No
Shadow Mode: Stencil shadows
Shadow Map Shader: Low quality
Environmental Reflections: Disabled
Advanced Occlusion Settings: No
Ambient Occlusion: Off
Occlusion Strength: Off
Blur: Bilateral
Ambient Resolution: Performance


Gamma Correction: 1.000
Geometry Buffers (VBOs) Enabled: Yes
Suppression of FX When Camera Close Enabled: No
Close Suppression Range: 3.000
Show Advertisements: Yes

Audio Mode: Performance
3D Audio: No
FX Sound Volume: 0.600
Music Sound Volume: 0.600

Show Advanced Graphics Options: No
Overall Graphics Quality: 0.500
Reverse Mouse Buttons: No
Save Login Username: Yes
Transfer Rate: Unknown bytes/second
Current Game Version: ?
Installation Directory: D:\NCSoft\City of Heroes

Mod files in the Data directory
.\texture_library\MAPS\city has 2 files
.\texture_library\MAPS\Midnight_Squad has 1 file
.\texture_library\MAPS\NewPlayerTutorial has 1 file
.\texture_library\MAPS\Safeguard has 9 files
.\texture_library\MAPS\sewers has 44 files
.\texture_library\MAPS\static has 40 files
.\texture_library\P_MAPS has 2 files
.\texture_library\V_MAPS\City has 2 files
.\texture_library\V_MAPS\Outdoor_Missions has 9 files
.\texture_library\V_MAPS\Static has 16 files

1 odd thing i notice in the CoHHelper data, it lists my video card as having 2707 mb of memory, when actually its 1g.