Try changing the workgroup of the clone since the Presario one is not changing... if thats not your problem...
Make sure that both computers have their files shared under "properties" in network neighborhood!
I'm pretty sure that should work!
If worst comes to worst try to use the "Find --> Computer" function in the start menu and type in the name of the computer (the names Must be differ) that should be able to find your computer. Usually after you change anything in Network you will have to reboot your computer. I hope that this helps you!