Silent Hunter on Win7 x64, what gives?

[simsurfer]

This may be a long post, as I have been at this for the last week and cannot get this to work.

I am running Silent Hunter IV Gold Version on a Windows 7 64bit OS, my game keeps locking up my whole machine whenever there is a lot of action going on and or whenever I look through the periscope. It also locks up when torpedoes hit a ship (when looking through the periscope) although it can also happen when trying to save a game.

Here are my system specs:

OS Name Microsoft Windows 7 Ultimate
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name GAMEPC
Motherboard: Asus M4A79T Deluxe
Graphics card: ATI Radeon 5700
System Manufacturer System manufacturer
System Model System Product Name
System Type x64-based PC
Processor AMD Phenom(tm) II X4 955 Processor, 3210 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 3107, 4/20/2010
SMBIOS Version 2.5
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name GamePC\
Time Zone Eastern Standard Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 4.00 GB
Available Physical Memory 3.03 GB
Total Virtual Memory 7.99 GB
Available Virtual Memory 6.87 GB
Page File Space 4.00 GB
Page File D:\pagefile.sys

I have 3 partitions set up with Programs on the E:\ partition.

At first I thought it was my sound card causing the issue so I uninstalled that and enabled the on board audio on the motherboard, same result.

Reimaged PC, reflashed my bios to a newer version but the pc kept locking up during the OS install. Reset the CMOS, reflased back to previous bios version, installed the OS, game runs kinda sluggish till one gets some action then the whole PC locks up hard. I have installed Directx 9.x into the root folder of the game install, I have Directx 11.0 on the machine.

Yesterday I was monitoring what was going on in task manager, the game when you first start it up is running 904,032k of Ram and right before the game crashed yet again yesterday was using 1,121,136k of Ram. It appears that the game doesnt realize I have 4 gigs in the machine and thinks it has run out of memory?

I have reinstalled the game to stock 1.5 (UBoat version) same effect, I have turned down my graphics card, same effect. I have checked for overheating but that is not the issue.

Does Silent Hunter run on Win 7 64 bit or not, can anyone offer any help cause I am just out of ideas as to what this is.

Thanks.