Why is it popping up the chat window immediately even if I have set it to hide them?

gistfile1.pas

procedure TTorChatPurpleClient.OnInstantMessage(ABuddy: IBuddy; AText: String);
var
  conv: PPurpleConversation;
  im: PPurpleConvIm;
  time: time_t;
begin
  conv :=purple_find_conversation_with_account(
    PURPLE_CONV_TYPE_IM,
    PChar(ABuddy.ID),
    purple_account
  );
  if not Assigned(conv) then begin
    conv := purple_conversation_new(
      PURPLE_CONV_TYPE_IM,
      purple_account,
      PChar(ABuddy.ID)
    );
  end;
  if Assigned(conv) then begin
    time := Trunc((Now - EncodeDate(1970, 1 ,1)) * 24 * 60 * 60);
    im := purple_conversation_get_im_data(conv);
    purple_conv_im_write(
      im,
      PChar(ABuddy.ID),
      PChar(AText),
      PURPLE_MESSAGE_RECV,
      time
    );
  end;
end;