The first step is to resolve network connectivity. When you use the cross-over cable, did you check to make sure that the link lights on both computers lit up?
Next, both systems need to be on the same logical subnet. Since you have two computers connected, you should configure them with static IP addresses.
For example, PC1 - 192.168.0.1, subnet mask 255.255.255.0, and PC2 - 192.168.0.2, subnet mask 255.255.225.0. No default gateway.
Open a comand prompt on both computers and use the PING command. If you have connectivity, that's good, next step is to configure the apps to work together.
No connectivity, check the IP settings, next check to make sure you do not have a local firewall application blocking network connectiivty.
report back after you check on this...
JorgeM
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