error code 3 during upgrade from Windows NT4 to Windows Server 200

Hello,

During the upgrade process form Windows NT 4 to Windows Server 2003, we got
this error code:

10/7/08 12:26:55 AM > START -- Execute "c:\MSCS\cluster\i386\setup.exe
-uninstall -u"
10/7/08 12:26:55 AM > INFO -- has to be finished in max. 1 minute(s)
10/7/08 12:26:55 AM > EXECUTED -- "c:\MSCS\cluster\i386\setup.exe
-uninstall -u" RESULT CODE [3]
10/7/08 12:26:55 AM >
10/7/08 12:26:55 AM > FATAL ERROR -- Expected RESULT CODE(S) [0,0]
10/7/08 12:26:55 AM > FATAL ERROR -- Script stops here
10/7/08 12:26:55 AM > INFO -- Registry key does not exist --
"\HKEY_LOCAL_MACHINE\SOFTWARE\FORCE Computers\2003 Upgrade\StepStartTime"
10/7/08 12:26:55 AM > INFO -- Registry key does not exist --
"\HKEY_LOCAL_MACHINE\SOFTWARE\FORCE Computers\2003 Upgrade\StepMaxDuration"
10/7/08 12:26:55 AM > Disable AutoAdminLogon
10/7/08 12:26:55 AM > Write Registry value --
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Winlogon\AutoAdminLogon 0 REG_SZ RESULT CODE [0]
10/7/08 12:26:55 AM > Write Registry value --
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Winlogon\DefaultUserName REG_SZ RESULT CODE [0]
10/7/08 12:26:55 AM > Write Registry value --
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Winlogon\DefaultPassword REG_SZ RESULT CODE [0]
10/7/08 12:26:55 AM > Write Registry value --
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Winlogon\DontDisplayLastUserName 1 REG_DWORD RESULT CODE [0]
10/7/08 12:26:55 AM > INFO -- Registry key does not exist --
"\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Cu rrentVersion\Run\AutoUpdate"
10/7/08 12:26:55 AM > FATAL ERROR -- Wrong result code -- upgrade stopped
--
Where can I find relevant information about it?

Thank you for your help.