I am developing a ws-bpel process using wso2 developer studio and I am following this Tutorial.
But when I want to deploy the Bpel process on the BusinessProcessServer, I am not able to test it. I get  an empty interface.

I must have the request message to send it. I don't have  any error in the bpel process when i generated it's .zip file. 
Can any one help me please ?