Bluetooth doesn't connect to radio
I recently purchased and installed a Pioneer AVH-X2700BS radio. Everything was working fine with the bluetooth until today when I disconnected from the radio and hit "Forget This Device". Now when I went to re-pair with the radio a message pops up saying that I could not connect to the radio and to make sure the device is on. I am very frustrated with this because everything was working fine the other day. Any suggestions?
iPhone 6 Plus, iOS 8.3, null