Take a look at the notes on this page --
http://www.zauruszone.farplanet.net/wiki/i....php?SerialPortYour pinouts sound exactly the same as that on the digitraveler GPS, so I would give that a try. See my wiring notes near the bottom of that page (just above the section on the Nextel i88 phones).
I also have not been able to get qpegps to work. To start up gpsd, I use the following command:
gpsd -p /dev/ttyS0 -s 4800
Try loading the GPS version of zRoadmap. When you launch the RoadMapGPS, it will have a single line at the bottom showing the output from your GPS. If the data is scrolling, then you have a live connection. Take your GPS outside and wait for the satelites to start showing up.