Does anyone have any hints as to why my program would read data from the serial port with no problem when out of the car but has trouble when in the car?
I have assigned the port to user applications (through hijack).
When I was writing the program in my house with the player in forced DC mode, it worked great. Now when I try to use it in the car it won't work.

I have plugged my laptop into the player (in the car) and seen the boot up messages and been able to send commands to the player program (after changing the serial port mode through hijack).

I am using a null modem adapter with the in car serial port (I tried it without as well) since the device I'm trying to access is meant to be plugged into a PC serial port.
I can see data from the device fine with my laptop.

I just wanted to see if I was missing something obvious before I try to debug more (I guess I'll try to get an ethernet connection to the player while in the sled...)
Any advice would be appreciated.
In case it helps, the device I'm trying to listen to is an Innovate Motorsports LC-1 wideband oxygen sensor.
Thanks!

-Jeremy