Cannot submit form data when clicking button with an application deployed out of Bonita studio

Hi,

I have followed the "Getting started tutorial" and tried to create my own application.
I have tested it in Bonita BPM Studio: first by clicking on [Run] button of Studio, second by deployed it on the embedded portal. The tests was OK.
Then i deployed it on another environment (without Studio) and it doesn't work.

My page is "devsProgressForm".
The submit button is configured with:
- Action = "Submit task"
- Data sent on click = "formOutput"
- Target URL on sucess = "/bonita"
The declared variables are:
- formOutput (javascript) = "return { 'devsProgressInput': $data.formInput.devsProgressInput};"

I think that i have to change these values with REST API calls but all the tests i tried didn't work.

Can someone help me (i also try the complete Vacation Management application, but the process to add request is done under Bonita Studio, only the Vacation list process is deployed on another env)

Many thanks.