Upload a file with Jmeter in a JSF web application

I'm trying to upload a file in a web application, is made with JSF. This is the request that is recorder with the blazemeter's extension

blaze meter request

This is the request in the browser

browser request

And the value of the Webkitform is this:

web kit form value

I see the name of the file. But when I run the script it doesn't upload the file. The file is in the same folder where is the script.

After I run the script I check on the web and I see that other form fields that are sent with others request of the script are saved, but not the file.

What configuration must have the request? Or what else do I need to upload the file? Thank you.