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I know nothing about the machines you refer to. Thus, your questions are not clear to me.
It appears that you have two computers, or you have disposed of an older computer. How did or does the old or new computer communicate with the machine that you download to? Are you using RS232 for this download communication path? If so what are the details on cable wiring, all parameter settings, and kind of RS232 port?
If not RS232 what is the communication path for the download?