Cannot override UAC on the remote PC
Mouse clicks are not working with the UAC prompts.
User Account Control (UAC) is a security subsystem/infrastructure in Windows Vista/7 notorious for its prompt windows that ask the user which action to take.
In order to be able to remotely control the UAC prompts you need to install the Host on the remote PC. If you are using Agent instead of Host, make sure that the Agent is run as an administrator.