I've moved your thread to "Networking".
"Website Discussion" is for discussing the Cable Forum site itself.
The IP you posted was your actual ISP issued IP address, the address your cable modem gets (as such I've removed it for your security).
The PCs' IPs should each be a local IP address assigned by the router - e.g. 192.168.1.2 for one & 192.168.1.3 for the other.
What are the network settings of both PCs?