Unable to connect with Anti Theft to Account

I cannot connect or sign in from Anti-Theft (on Samsung mobile) to my web Account. When I try it writing my account email address and phone number, the massegas come: AUTHETICATION_FALED. Anyway the 3G is running. And I can connect with my home PC to Avast Account, just with mobile I cannot.

Same problem, after reinstallation problem sill remain.