YMMV, but I found that RS would not recognize the CDLC files until I put the DLL in the dlc directory. However, when I selected the now visible CDLC songs they would lock up RS (as described by the OP) and I'd have to task manager out. On a whim, I relocated the DLL to the RS root directory. Now I can see and play the CDLC songs. In summary: DLL in dlc directory to get RS to see the CDLC songs. DLL in root directory to get RS to play the CDLC songs without locking up. Dunno why...