The message "Configuration Version Mismatch" is caused by the fact that your Beo5 has been updated to firmware 1.23a which is the latest version, but you are using Configuration Tool Version 1.02 which only supports the previous firmware version..
For this to have occurred your Beo5 must have been updated using the new Configuration Tool version 1.10 which means most previously produced configuration templates must be reproduced from scratch.
Based on the information supplied it means you must use the updated Configuration Tool version 1.10 which is normally only available to dealers.