Max numbers of activations of Acrobat are reached

After a crash of my HDD and new installation of Windows 7, I can't install my Adobe Acrobat 8.1, because the max numbers of activations of Acrobat are reached.

Before the crash I use Adobe Acrobat 8.1 with full licensed.

What can I do in order to install my current version 8.1

Activations by internet was not possible also by phone I don't reach somebody in order to clarify this problem .