Hi,
error code 53 means "The network path was not found". Can you reach the machine (JFDKW03) from the server? Can you e.g. ping it? Isn't there some kind of firewall installed on the workstations that could be preventing the machine from being accessed?
Also, please try directly (on the server)
net use \\JFDKW03\C$
Does that work?
BTW the fact that all the machines don't have the OS, memory etc. fields filled in is normal -- they're filled in as soon as the agent is installed on them.
Thanks
Vlk