AllocateAndInitializeSid fais with ERROR_MOD_NOT

AllocateAndInitializeSid fais with ERROR_MOD_NOT_FOUND

Hello Experts,

my XP service impersonates a user at startup. Because this user must have the SE_TCB_NAME privilege, I try to call LsaAddAccountRights at the first start after installation.
But the service throws a NullReferenceException exception at AllocateAndInitializeSid, GetLastError returns ERROR_MOD_NOT_FOUND.

This is my declaration:

[System.Runtime.InteropServices.DllImport("advapi32.dll")]
private static extern bool AllocateAndInitializeSid(
      SID_IDENTIFIER_AUTHORITY pIdentifierAuthority,
      int nSubAuthorityCount,
      long dwSubAuthority0, long dwSubAuthority1,
      long dwSubAuthority2, long dwSubAuthority3,
      long dwSubAuthority4, long dwSubAuthority5,
      long dwSubAuthority6, long dwSubAuthority7,
      IntPtr pSid);

[StructLayoutAttribute(LayoutKind.Sequential)]
      class SID_IDENTIFIER_AUTHORITY {
      [MarshalAs(UnmanagedType.ByValArray, SizeConst=6, ArraySubType=UnmanagedType.U1)]
      public byte[] Value;
}

And there the Exception occurs:

SID_IDENTIFIER_AUTHORITY auth = new SID_IDENTIFIER_AUTHORITY();
auth.Value = new byte[6]{0,0,0,0,0,5};

try{
AllocateAndInitializeSid(new byte[6]{0,0,0,0,0,5}, 1, SECURITY_AUTHENTICATED_USER_RID,0,0,0,0,0,0,0, sid);
}
catch{ eventLog.WriteEntry(GetLastError()); }

I also have tried ConvertStringSidToSid, but it fails with ERROR_INVALID_HANDLE:

String strSid = "S-1–5-11";
if( ! ConvertStringSidToSid(strSid, sid) ){
      Console.WriteLine(GetLastError());
}

Does anyone know this problem? I can't find anything about it on the web.
Thanks,
coco

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AllocateAndInitializeSid fais with ERROR_MOD_NOT_FOUND

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