If you are installing a trial version of the product, you do not need to enter a serial number. Just click "Next" and fill out your contact information to install Acronis True Image Home 2010 in trial mode
Run the installation file, put in the serial key and install the add-on
The issue may occur after installing Acronis True Image Home 2010 over a previous version
The most probable cause is that a previous attempt of remote installation was interrupted
This article applies to:
There are no issues with having the Acronis Management Consoles from both products on the same machine or in the same network
Remove the license from Acronis License Server, and the add it back
The issue may occur when you are installing the product on the machine that has traces of previous installations of Acronis True Image or Acronis Backup & Recovery 10
Download and run a Linux shell script to resolve the issue
Install the latest build of Acronis Backup & Recovery 10 (Build 11133)