If you are using this to replace a non functioning remote you might have reset your Roku trying to get it to work--doing this takes all your network info out of your Roku. Once that happens this app wont be able to "find" your Roku. Luckly, we have a 2nd Roku whose remote I was able to pair with this Roku so I could re-enter my network info--then it worked like a charm. That is one big downside of the Roku--it is WORThLESS without a working remote. Great app once I figured this stuff out.
APuzzler about Remote for Roku