For Nelgin's null modem setup, putty doesn't raise DTR?

<nelgin> sexpots   1492                               root    3u      CHR               4,64        0t0         90 /dev/ttyS0
<nelgin> Well, it's listening, but when I connect with putty I get nothing.
<nelgin> DigitalMan, probably always assume a client is connected since I have my pc wired to my linux box.