It appears that the specific server 'JustMarkets-Live' is not listed among the available options for connection. You've mentioned attempting connections to other servers provided by JustMarkets, but encountering failures. If 'JustMarkets-Live' is the designated server for your account, it might be worthwhile to reach out to JustMarkets support directly for assistance. They can provide guidance on resolving connectivity issues or possibly clarify if there have been changes to server names or settings.