I bought an index like a week ago; but now the visor can't be updated.

It works well, it is all fine, but it can't update. The first udpate right on it's first install went fine, and the visor keeps working fine, but since yesterday a new update has been released for the visor firmware and whenever I try it, it keeps getting stuck on the first step and telling me that the device could not be updated

Could anybody help me?