Game crashs

Hi, this is my first post i hope i can do it well (also sorry for my english level, i’m not a native speaker, i from Venezuela).

First i wanna say thank you for read this and for your awesome mod BlackMesa (i hope you win in the Mod DB, i already vote for your mode).

Well, now, the game crash.

I already read that you have to name de folder BMS and i have it.
https://twitter.yfrog.com/z/0czhp

My computer specs:
CPU: AMD processor Phenom II x4 965 3.4 Ghz (Black series)
GPU: ATI Radeon 4300/4500 Series (4350) 1 GB GDDR2 RAM (support DirectX 10.1)
MOBO: ECS Elitegroup Black series 780GM - HD sound and video/HybridCrossFire
RAM: 3.0 GB DDR2 800 Mhz
HDD : 320 GB Hitachi
Monitor: Flat Screen (LCD) VGA Generic 17" (not widescreen - not HD Display)
(Resolution): 1280*1024
Audio: Stereo Speakers generic and Headset Genius®
OS: Microsoft Windows 7® (64- bit version)

I used fraps and i have 25 fps with no full settings.

https://twitter.com/i/#!/Roberto_Fergus/media/slideshow?url=pic.twitter.com%2FRGmTUNNV

SS of the crash message:

https://twitter.yfrog.com/0j38p

And i attached the mdmp. I think is the first one for the date. Thank you.
hl2_4104_crash_2012_12_17T5_24_2C0.mdmp (110 KB)
hl2_4104_crash_2012_10_18T5_7_55C0.mdmp (87.9 KB)
hl2_4104_crash_2012_11_4T21_45_20C0.mdmp (93.2 KB)

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.