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How Can I sniff GATT Service or Characteristic Attributes by PCA10031 (NRF51 Dongle)?

By using ble-sniffer, I success to catch BLE Advertising packet with my NRF51 Dongle in CMD and WIRESHARK either.
But, I can't sniff any other packet except type of ADV_IND, ADV_SCAN_IND, SCAN_REQ.SCAN_RSP and some of Unknown (CRC Incorrect Packet).

Does This NRF51 and this BLE_SNIFFER program can catch GATT Service or Characteristic? I tried to catch the values between GATT_Client and GATT_Server's communication.

During Capturing packet, I tried NRF51_DK's BLE_pheripheral, BLE_Central APP_Uart Example.
Sending lots of characters between two DK Boards, and also double checked with my Serial Monitor whether the characters were sent correctly.
But as my trial of all these stuff, I COULD NOT FIND MY ANY OF GATT Service or Characteristic Attributes.

Does NRF51 Dongle can sniff all of these data? Or it's just me that i can't snitch these packets?

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