iTunes Cloud Library no updated

Hello,

I am an old user of iTunes and subscribed fo iTunes match for years.

How I manage my music is having it on my mac on iTunes and sincronized the library in order to enjoy the music on iPad - iPhone.

However since few weeks, the new music I have incorporated in the iTunes library does not get updated in the cloud and no possible to see it on iPad-iphone.

The message of "loading your music library, this could take a few minutes" appears, but stays for hours with no results...

Thx for the support