First of all, good USB cable and 2nd of all has been known that some ftdi chips are not ok, or they break. So if after you write hex to lpc and dump from ftwrite it's not working, then replace ftdi and will work.
Also said 100 times, just to be safe, try and manual install driver for interface from installed program folder (even if you interface is ok in device manager) to be 100% sure it that driver and not another installed. Make ftwrite and run program.
The one without date back in fact at run applies again ftwrite part, so if loader does not make it , you make it before run.
If still does not work change FTDI chip.
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