Bluetooth Radio won't move through the folders

[free4flight]

I have a Pioneer MVH-X370BT and using my phone to run the music. It will play through the songs one by one, and fast forward or backwards in the song list but not the folder list. I have to manually switch folders on the phone but I am sure that the radio is suppose to control all of it like the one by one, forward and back. Is there a setting that will send the folder list to the radio? I did not see one.

 

The radio has an app play function but it will not connect to power amp for some reason.

 

Any suggestions?

 

thanks