Eric,
If you have bound this particular combination of receiver and transmitter before then one possibility is that you have got the transmitter and receiver too close together as Dave mentions above. I had similar problems binding a DX5E transmitter and receiver a few months ago and there may be some information to help you in the thread here:- **LINK** As an aside I never did get a response from Spektrum to the questions I posed to their service dept in Germany.
On the other hand if this is a new combination for you it could be a compatibility issue between transmitter and receiver as Spektrum have changed their system standards several times and not all are compatible.
According to the AR610 receiver instructions this receiver is not compatible with a DX6 park flyer transmitter, I don't know why, its a mystery to me but its in black and white in their instructions so it must be true.
If the DX6 transmitter is a relatively new DSMX standard and imported into the EU after 1st January 2015 it will not be compatible with the old DSM 2 standard receivers (as I discovered by personal experience).
If you could advise us of the standard of your transmitter and receiver it might help with the diagnosis of your problem.
Gareth