How to combine DTM and Application in Zephyr.

Hi everyone, 

I tried the DTM example from /samples/bluetooth/direct_test_mode/src , it work well,

but once I added "CONFIG_BT=y" in my prj.conf file, and testing the BLE function work fine, but DTM function will run with error. it look like stop respond after TX signal started. 

I tried to call bt_disable(); but it look like same wrong. do I miss anything else ?