This might be findable in the files section of this site, but I just looked and there are no listings for any models with model numbers starting with R. Are you sure you've got the right model number?
Are you saying you've got the remote for this receiver, but the bass up and bass down commands don't work?
And... for programming which learning remote? Are you able to use hex codes, or do you have to have the IR as actual IR that you then learn into the learning remote?
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw