Remote deloyment of agent requires a network access to the client machine using IPC$ mechanism. Please ensure that works fine. You can try accessing the client machine from core manually to confirm that ( :\\DEVICE_IP\c$).
I am not sure if I understood your question completely. I can think of checking the firewall status on either end. Secondly that the " server" service which enables file sharing, etc on a WIndows client machine.
Once you are able to access the C$, you can proceed.