Let's take this discussion to [Link: hifi-remote.com].  There are lots of people there who may help, and more importantly, you can upload your RMIR file so that we can look at it and see why it isn't working.

I took a quick look, and dmport is assigned to the Ch+ button. On the General tab, did you set Audio Channel device to Audio? If you didn't then the remote will send IR signals for your cable device--you can see that becasue the CBL LEd would flash instead of the Audio LED.