Hello Victor,
Thank you for your message.
Could you please clarify if you've already updated all Remote Utilities modules to the latest version 7.1.7.0 (version 3.3.2.0 for the RU Server)? In addition, please let us know if you have any antivirus/firewall software installed on any side of the connection and if yes, please also let us know the name of the software.
Looking forward to your reply.