Alexa testing console doesn't ask to me

I'm working with an alexa skill, I tested it in AWS and it works but when i go to test tab to try to ask something the only result is " " what should be the problem? my skill name is "test" that has an intent called "sensor" that recive a {sensor}variable type. To trigger Alexa I use to ask "Alexa, start test sensor 1234" but the answer is the one I indicated above.