This error usually occurs because your account has IP authentication turned on. This means that the API will only accept requests from the IP addresses you have listed - requests from any other address will be rejected.
To fix the problem, you can either add the additional IP addresses you are using, or turn IP authentication off. To do this, log into your account and select "IP Authentication" from the 'My Account' menu.
Article ID: 60
Category: Using Our Services
Rating (Votes): (34)