Beacon don't work

I buy the Estimote Beacons 6 months ago.
Today I test the SDK application and the App Store application but I don't find the beacons.
I have the bluetooth active

The problem is the battery change? I read on the documentation, the battery work for two years

Please write to me: ola at and I'll help.

Ok, I send email.
Please reply ;)

Sure, please check your inbox. I've just replied.

Hi, I have the same problem with my beacons, what was the solution?