Endnote failed syncronization

Hi,

I use endnote desktop and the online version both on my PC and on my laptop. I have been having trouble logging-in. I have used the same account and password between my PC and laptop but somehow my PC failed to accept my password. I have finally managed to change it but now my library does not syncronized with the online version of Endnote.
I couldn’t figure out how to get in touch with the customer service through email either.
Any suggestions?

Thanks
Silvia