Failure to Initialize SUSI API dll

Question

I'm attempting to use the SUSI api dll that was provided to me. The first step according to their documentation is to call SusiLibInitialize. When calling it I seem to only get the failure result from the function when I'm expected to get SUSI_STATUS_INITIALIZED as the result.

I do not have much experience with c++ dlls however several other articles and posts seems to do it as down below. I've also tried passing the name of the external function in the function declaration. Am I calling it incorrectly or could this be a issue with the DLL? The application they provided (closed sourced) is able to use it correctly.

const
  SUSI_DLL = 'Susi4.dll';
  SUSI_STATUS_NOT_INITIALIZED = $FFFFFFFF;
  SUSI_STATUS_INITIALIZED = $FFFFFFFE;
  SUSI_STATUS_SUCCESS = $0;

function SusiLibInitialize: UInt32; stdcall; external SUSI_DLL;

{$R *.fmx}

procedure TForm1.btnTestClick(Sender: TObject);
begin
  var
  result := SusiLibInitialize;

  if result = SUSI_STATUS_INITIALIZED then
    ShowMessage('Init')
  else if result = SUSI_STATUS_SUCCESS then
    ShowMessage('Success')
  else if result = SUSI_STATUS_NOT_INITIALIZED then
    ShowMessage('Failure');
end;

Answer 1

Before posting the question I never thought that it might be a hardware requirement. After posting the question I suddenly had the idea to run it on the machine itself it works there.