Let's start with something easy: A null modem cable is definitely not an RJ45 network cable. Furthermore, it won't work when plugged into a VGA connector.
Now it's becoming more advanced: If your IP address is 10.0.0.1 and the IP address of another device that is connected via a cross-over network cable to your computer is 192.168.0.1, you should change your IP address. No, it won't work if you use 192.168.0.1, too. And no, the device will not change its IP address on its own.
And a last one (at least for now): File names are very sensitive. They get angry if you do not use their real name. Keep in mind that these involves the case and the file extension. For example: ID10t is not equal to iD10T. The file extension is sometimes not shown by Windows. You might consider using a real operating system. However, true IT pros know an amazing trick: They are able to tell Windows to permanently show the file extension!
