Recovery Manager Agent service listens 9001 TCP port by default. Sometimes this port is used be different services, for example SharePoint Load Balancer service.
The default port can be changed on the any free port available in the system.
In order to change port number:
<servicename="RM4SP.RemoteExec" behaviorConfiguration="ServiceBehavior">
<endpointaddress="net.tcp://localhost:9001/RemoteExec" contract="RM4SP.IRemoteExec" binding="netTcpBinding" bindingConfiguration="Binding1" />
</service>
<add key="RemoteAddressTemplate" value="net.tcp://{0}:9001/RemoteExec"/>