Here are some tips:
1. Ensure you have a null-modem adapter in your cable setup. Somewhere in your cable chain. A null-modem adapter will say "NULL MODEM" somewhere on the device.
2. Right-click the amiga explorer icon & make sure the correct serial port for your PC (COM1:, COM2
is chosen... I believe it defaults to COM1. Make sure that the serial port is listed in Device Manager under "Ports (COM & LPT)". Make sure there is no (!) or (x) mark on the device's icon in Device manager.
3. Test the cable setup: Load up hyperterminal on the PC, and a terminal program on the Amiga. Set both to 9600baud, 8 data bits, no parity, 1 stop bit, no handshaking. Typing characters on one system should show up on the other. If not, you have a cable or configuration issue.
4. Test handshaking: enable hardware handshaking on both ends and check connectivity by typing on each machine. If you passed #3 and fail here, then you have a miswired serial cable (or, less likely,miswired nullmodem adapter).