There are few things that you want to check first.
1. is the firewall on by any chance? you might want to try it without firewall.
2. if your client is xp, open windows explorer, go to tools, folder options.
at the bottom, check whether "use simple filesharing" is unchecked. if it is checked, ghost remote client install will not work.
also there is a log file called rcilog.txt in c:\program files\symantec\ghost, this log file might give you more information why remote client installation failed.
hope this helps. :)