they told me that, with the newest version of PHP, it won't work. They said the code for the Jetpack plugin appeared to be deprecated and suggested that I use something else.
Could you ask your hosting provider for more details about this? It might also be useful if I could have a look at your site to run some tests? Could you post a link here, or contact us via email if you want the site URL to remain private? If you do so, do not hesitate to mention this thread in your email so I can follow up with you.
Thanks!