I don't have a 2104 anymore. I thought someone else would have replied by now with some info. You might be running into one of the stupid 2104 limitations. Ir.exe let's you TRY lots of things that won't always WORK, depending on what remote you are using. I know the 2116/2117 has the newer, smarter VPT that defines the VPT device but lets you "opt-out" of VPT for some device modes. I think the 2104 had the dumber version of VPT with no "opt-out". You can use special protocols to get around this, though.