415 Unsupported media type

[Erez Naim]

While writing an Agenda which involve Json type I am sending a request using the PUT method for http request for my under test environment URL site. I am sending in my headers the specification of the data I want to use 'wlHttp.Headers('content-type') = "application/json". When doing it in an outer tool which imitate requests I am getting positive response code (200) , while doing it (the same action) on WebLOAD, I am getting error response code 415, any idea how to solve it?, maybe pre-configuration action needed?

Thanks for any help :)