Rob--If you used a preloaded device code (what UEIC loaded before it was sold) you didn't use any memory, or an insignificant amount. If you used a lot of learned keys, and macros it's possible you've exhausted memory. You didn't specify how you were able to program your devices into your 2104, so we really have no way of knowing how much memory and what type you've used. Using advance codes eats up less memory than learned buttons, so if you can find the advance codes for the missing keys of a preset device code you'd be better off, generally, to use the advance code. Using "up through the 9-9-5" part were you trying to program in an advance code to supplement a device code, or were you trying to "learn" a button from your original remote?