Pairing Clip Sport Plus with wireless headphones

I recently bought 2 Clip Sport Plus players for my kids because I liked the bluetooth option and the clip for when they are practicing sports.  However, I cannot get either player to pair with the headphones.  Very frustrating!  The headphones are PowerLocus and both sets immediately pair with my iphone.   Under the bluetooth option on the players the headphones show up and I click on it but nothing happens, no pairing.  I have done the update and tried turning on and off both items multiple times in multiple orders and nothing.  What can I do to pair the items?  SInce the headphones immediately work with my iphone I feel this is a SanDisk issue.  Thanks!