ESP32 BLE Connection Problem

I was making a relay station using BLE, using the Blynk software. So my ESp32 connects to my mobile and then decides to not connect again even after restarting and reconnecting my esp32 and switching on and off my bluetooth. And i have used BLE because when i tried the BT example from the blynk examples it wouldn't upload to my ESp board and when i did upload the BLE example it would upload. So please help me. Thanks in advance.