LMS problem with applications from MySqueezebox

Hi!

I'm gonna try to explain the strange behavior I'm facing since few days with LMS.

The problem:
A long time ago, I've installed Deezer's application from my MySqueezebox account. I used to play music from Deezer without any problems.
Since a few days, when I explore Deezer application from either my Squeezebox Radio or the LMS web interface, I have errors messages, like :
- 503 service temporarily unavailable
- An error occurred while loading the remote control feed for Deezer: (An unexpected error occurred while validating your mysqueezebox.com account. Verify that network connectivity is working properly.)

When I try several times to access this resource, it finally works after 3, 4 or more retries. Moreover, I've absolutely no problems to access MySqueezebox account from my browser. This problem does not seem to be related with Deezer but with MySqueezebox access from LMS.

What I've done so far:
1) As LMS is installed on my NAS Synology (213j), I've :
- reinstalled from scratch my NAS (by following the double reset procedure)
- installed the "official" version of LMS
- Tryed the beta version
- And now I'm running the latest LMSrepack available
Those 3 versions have the same behavior regarding my problem.

2) So I've also factory reset my SB radio. Nothing has changed!

3) I've changed my MySqeezebox password, deleted Deezer application from my account, reinstalled it ... but it always ends with the same problem.

I've no more idea of what I can do to resolve this issue. Can you please advise with some solutions?
Thank you!