Crush on map bm_c2a5a

I have a glitch on bm_c2a5a map. When i die game crash with massage “Can’t load lump 53, allocation 6789549 bytes failed!!!”. Or when turn on turbines and go under the dam, game freeze, and windows report pops up saying “hl2.exe stop responding”, and when i load save again same thing happens. I have added latest mpdm file from source sdk 2007 folder. Also my rig specification if it helps
CPU: Core i5 2500k
Ram: 8Gb
MB: Gigabyte Z68MA-D2H-B3
VGA: Radeon 6950 1GB
Machine is not overclocked. VGA driver version is Catalyst 12.6. If i can provide any info that can help, let me know. Thanks for any possible help or solution.

Beside that, game is great, on of the best old school FPS games i have played in years.

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.