cURL does not work on a particular server

I have the following situation: a code makes a post for a remote API sending a file (image).

It works on the localhost ( localhost | Wampserver | PHP Version 5.5.12 )

It works on the Digital Ocean Server ( Server API: Apache 2.0 Handler | PHP Version 5.5.9-1ubuntu4.24 )

In Locaweb it does not work ( Server API: CGI / FastCGI | PHP Version 5.5.31 )

I've done several checks and found no solution. Any suggestion of which directive, version, path, etc., to check?