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Custome UUID with Nrdic UART SERVICE (nRF51822)

Hello~!

I am working on modifucation code of ble_app_uart example.

nRF51822

(SDK12.3.0_d7731ad)

Softdevice 130 (v2.0)

I know the original UUIDs are provided from the example is that 

Nordic UART Service is 6E400001-B5A3-F393-E0A9-E50E24DCCA9E (16-bit offset: 0x0001).

TX Characteristic (UUID: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E)

RX Characteristic (UUID: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E)

My point is that I would like to change it to my own UUID without any changes.

MY SERVICE = "0000ff01-0000-1000-8000-00805f9b34fb"
MY READ = "0000ff06-0000-1000-8000-00805f9b34fb"
MY WRITE = "0000ff05-0000-1000-8000-00805f9b34fb"

I also have tried to change all of points that related to UUID values.

BUT When I change it, the UART function and advertising are stopped.

Please help my project kindly

Thank you. 

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