Half life 2 deathmatch memory could not be read error PLEASE help

[wolvesrdogs]

when i get to the loading screen on half life 2 deathmatch the game crashes and comes up the the memory could not be read message
i got half life 2 and counter strike source working by writing in this stuff in the propeties section of both which fixed pretty much the same problem with half life2 exept the screen just freezes with HL2
If u know how i can fix this the please post the solution

 

[AntiAnto]

What are your specs?

 

[wolvesrdogs]

you sont need to see them

when i get to the loading screen on half life 2 deathmatch the game crashes and comes up the the memory could not be read message
i got half life 2 and counter strike source working by writing in this stuff in the propeties section of both which fixed pretty much the same problem with half life2 exept the screen just freezes with HL2
If u know how i can fix this the please post the solution

760 mb ddr ram
2.53ghz P4
256k modem
64mb graphics card