>Are you using a null modem cable?
>
>A null modem cable is an RS-232 serial cable where the transmit and receive lines are crosslinked.
>
>I'm pretty sure is what you will need to get this to work. A regular RS-232 serial cable will not work as it doesn't cross over the transmit and receive lines.

If the result looks OK in Hyperterminal then the cable is likely to be OK.....