Cornflake

Apologies if this has been asked before, I have had a look to see if it has and I wasn't sure which was the best thread to post in.

I'm trying to get my files off my Amiga 4000/040 using Amiga Explorer.
All settings (matching com port and speeds) are correct and I've tried with 2 different null modem cables. I'm running through a USB to serial on my PC.

Amiga explorer seems to make its way through set up and through the RX RAM:Setup phase but then fails with an error writing to COM port.

On my Amiga RAM I end up with 2 files Setup and Setup2 and the following final error within the AExplorer_pc.log file.
PC to Amiga transfer: "C:\Program Files\Cloanto\Amiga Explorer\Amiga\AExplorer" to "RAM:RAM/AExplorer" (45876 bytes)
Write Packet 2
> [0 bytes]
COM WRITE ERROR: 26 bytes should have been written (code 0, timeout 5000)
Write Packet 109
> [0 bytes]
COM WRITE ERROR: 12 bytes should have been written (code 0, timeout 5000)

Any help would be absolutely amazing!