Having trouble using cs.search and getting a list of compounds

Hi, When I run cs.search('glucose') in python, I don't get a list of compounds like it says in the ChemSpider documentation. Instead it gives an object but says Failed.

>>> from chemspipy import ChemSpider
>>> cs = ChemSpider('6zvrJ9vSmlsrPMKhGaaWZt8oY7AYx4IT')
>>> results = cs.search('Glucose')
>>> print(results)
Results(Failed)

Do you know why this could be the case and how to fix it?