Vista - Vietcong crashes

Well, It was about time. All games that I have tried so far on VISTA (1.5 year I am using It) worked. But, now...
Vietcong is dead. I am using v1.6+add-on FIST ALPHA.
I run the game normally, start the campaign, play for 20 minutes everything runs smoothly, but always when I must use the radio game crashes.
Problem Event Name: APPCRASH
Application Name: vietcong.exe
Application Version: 0.0.0.0
Application Timestamp: 00000000
Fault Module Name: logs.dll
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 4013e91b
Exception Code: c0000005
Exception Offset: 0013be4d
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 5146
Additional Information 1: a806
Additional Information 2: 153817116a94e42037215fa3c1308d29
Additional Information 3: 935b
Additional Information 4: 2cfb93b423cef165ca776629599e0b7f

Here's the info.
I tried to set compatibility mode to win. 2000 or XP, and It didn't give results.
Even tried ths on VISTA 32 bit, still the same problem.
Software: SP-1; Realtek HD 2.19 drivers; 182.46 BETA drivers.
My graphics card is 8500GT; proc. ATHLON 4600+; and I have 2.5 GB DDR2 RAM.
I have even downloaded and installed MARCH DIRECTX, still nothing.
Guys, help, please.

C'mon hackers, anyone?

UPDATE: Multiplayer works like a charm.
BUT, SP still sux.