setting up hd radio

i need some help setting up my hd radio to road runner. i went with the diy method and built the circuit from this http://www2.dasilvas.info/hd-radio. i bought a rs232 to usb adapter to connect to the diy circuit. when i plugged it into my computer, i hear the click that the module is turning on, but the road runner keeps saying that there is an error and to check the com setting. from what i have read, everyone says that i need to edit the rr.ini file. i am not that familiar with how to edit it. any help would be great

First step is probably to test with the mjs hd radio app. No ini to much with.

sorry im not really sure by what you mean. are you refering to the road runner program or is there a separate application i need

if you purchased your cable from me, you would have a cd with a stand alone app
since you didnt... download it from my skydrive

https://skydrive.live.com/#cid=ED932...BF9C9CB3%21277

if it works with that, it will work with RideRunner