SoftICE crashing on Windows 2003

I wanted to debug some program which only runs on a "Windows Server" OS. So I installed Windows 2003 on my PC, installed chipset and graphic drivers and used Windows Update to get the latest patches. Then I disabled the "NX-Bit" which is set to "all applications" as default on Windows 2003.

Then I installed SoftICE from DriverStudio 3.2, replaced the OSINFO(B).DAT included with the latest versions (dated 08/13/05 and 10/20/05) and rebooted my PC.

But my PC crashed with a BSOD in "CptHook.sys". I tried several times without success. When telling the SoftICE boot-loader not to start the hooking engine, Windows boots normally, but I can't load SoftICE.

I checked the system requirements and it says:

System Requirements for DriverStudio & SoftICE Driver Suite

Operating systems compatibility

For x86 processors and compatibles, DriverStudio 3.2 and SoftICE Driver Suite 3.2 support the following operating system platforms:

* Windows XP Release, SP1, SP2
* Windows 2000 Release, SP1, SP2, SP3, SP4
* Windows Server 2003 Release, SP1 Beta

For Intel's Itanium and Itanium2 processors:

* Windows XP Release
* Windows Server 2003 Release

For AMD's Opteron/Athlon64 family of processors:

* Windows Server 2003 SP1 Beta 1 (1184)
* Longhorn (Build 4074)

Side Note: DriverStudio 3.2 does not support the following platforms:

* Windows 95 and 98
* Windows NT 4.0

However, the DriverStudio 2.7, which supports Windows 95, Windows 98 and Windows NT, is available on the DriverStudio 3.2 CD-ROM.

I have installed "Windows 2003 SP1 final", so it is not really supported officially, but I guess nothing important has changed between "SP1 beta" and "SP1 final".

Has anybody some idea what the reason for the crashes might be?