Dallas,
The remote has lost the engine number. It happened to me on one of the Versions of DCS 4.xx I think.
You can add the engine back into the remote and it will come up with a different engine number in the remote as the number is gone. The only way to get the original engine number back in that remote is with a remote reset and that will clear the remote. If you have another remote cloned you can easily get the remote back as it was without having to re-add all the engines.
