Mike
If you are still having problems with your Sony cd player check out the Features section of this website.
There is a list of differnt things to try when having problems learning codes.
As a side note I also have a Sony cd changer(cx230) and it works great with the Omniremote.I have many macros to play favorite songs off the cds and they all work everytime.I didn't even have to program any pauses into the macros.
If you continue to have problems I will E-mail a pdb. file with just the control buttons for my cd player to see if that will work on your cx100 cd player.
Good luck.
Dan