We try to make the trial key sign up and testing process simple and straightforward. With that being said, we see several common issues when trying to test a service:

• Trial keys are specific to the product. You will need a separate trial key for each product that you want to test. They are all free and we encourage you to sign up for as many as you need.
• Trial keys come with time and transaction limits. Check to make sure you have not exceeded either of these. Generally, we are happy to extend both, just let us know how we can help.
• On the 'rare' occasion, it might be your code ;). We offer a full suite of sample code covering most major programming languages, so you can compare, debug and/or getting testing right away.
• Using the wrong operation for your needs. Many of our products have multiple operations (for different needs) and you want to make sure you are using the correct one. Check out the product's Developer Guide for a list of operations for each product. If that doesn't help, our Applications Engineer team is available to help as well.

 Contact us - we want to help.