I connected the programming header as described in "nRF6930_Beacon_Ref_Design_UG_v1.0.pdf" 5.5.4 Programming interface. I was trying to program Beacon Kit but failed many times then I compared it with schematic of of Beacon Kit. I found out that there is a mistake in the documentation. In P2 pin number 6 is not ground its actually P0.11 and pin number 5 is not P0.11 its ground.
Many of you must be facing this same problem.
I am attaching screen shot that will clearly indicate the mistake.(/attachment/e0adb43d9ba15501224dce2c643476ba)
New version (1.1) of the Beacon User Guide uploaded today with this issue fixed.
I reported this to them a couple months back, but they havent fixed the PDF yet... :(
The source also has an error. The pin number for RX and RTS seems to be swapped around in "pca20006.h" given the breakout to the programming interface connector.