The version of the CMS is 1.7.9 and originally I installed version 1.8.0 of the Xibo client for Windows. However, after reading another article on the Internet I realised the version of the Xibo client for Windows needs to be the same as the version of the CMS, that is, version 1.7.9. So, our current version of the Xibo client for Windows is now able to communicate with the CMS.