Problem programming custom PCBs on nrf51822

Hi, I tried my best to solve my problem via forum but unfortunately no success. I got nrf51 DK and played with it a lot. successfully program the samples and tweak them a bit. using SDK 5.1 and s110 v6.

The problem starts when I try custom boards. I have made one based on QFAAC0 for which:

I have same problem with a board I purchased online, PTR5528 which is based on CEAA . Can program blinky but no BLE.

Is there something that I am doing wrong. I did connect the board to 3 V and connected the segger programmer pins as explained in the forum (That's how I program without an error)

Thanks in advanced for your help, Ali

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