Not sure what's wrong with yours but all I did was:
1) Get newest .dll from mitch's thread (i'm assuming your using his cable). It has instructions to place those files into the RR HD Radio folder and includes a command file to execute to set things up
2) Include the "HDRadioport=x" line in your rr.ini Radio section... where x is the port for your radio.
Other than that, I used RRConfig to set the radio type to HD Radio. I believe this can also be done by hand in the Radio section of rr.ini by setting the radio type to 8