Reason for no Bluetooth signal?

Question

I'm trying to finish a handmade custom board I started. I had previous problems with the crystals, and a few others, but right the thing seems to be working ok. At least I checked with UART that the board is running the hole code. I'm trying a simple Beacon example. But with the nRF Beacon application for Android I'm not seeing any signal. Even with the telephone touching the board. The board has a nRF51822FAAG0 with the balun BAL-NRF01D3, and a Johanson 2450AT43A100 chip antenna.
I'm really lost here, I have a series of reasons in mind why the Bluetooth signal it's measing: 
 
 A soldering problem with the balun. I had resolder the compoment a couple of times, I'm almost sure that it's in his right position, but it's very tricky to solder. 
 The shunt capacitor of
the antenna. I have a 1.5pF
capacitor there, when the
recommended it's 0.8pF. I'm trying
to get the 0.8pF one. 
 The 16Mhz
crystal. I have
 this 
crystal with 18pF capacitors with 5%
tolerance (the crystal load
capacitance is CL = 12pF). The
frecuency tolerance it's ok? Really
don't sure because the datasheet
it's not very clear. 
 The design
of the board and the code used it's
from the OpenBeacon proyect. So,
it's suppose to be a working
proyect. 
 
 Can you help to understand where can be the problem? What can I try next? Thank you so much. 
 I leave here the schematics of the board, and a Photo of the proyect.
 
 
 Update: And also the scope of the VDD_PA I got.
 
 OpenBeacon.PDF 
 OpenBeacon2.PDF 
 UPDATE:
This is the code of my advertisment function. 
 static void radio_send_advertisment(void)
{
	const TMapping *map;
	int My_tasks_txen;

	/* transmit beacon on all advertisment channels */
	map = &g_advertisment[g_advertisment_index];

	/* switch frequency & whitening */
	NRF_RADIO->FREQUENCY = map->frequency;
	NRF_RADIO->DATAWHITEIV = map->channel;

	/* BLE header */
	g_pkt_buffer[0] = 0x42;

	/* add MAC address */
	g_pkt_buffer[2] = (uint8_t)(g_uid>>24);
	g_pkt_buffer[3] = (uint8_t)(g_uid>>16);
	g_pkt_buffer[4] = (uint8_t)(g_uid>> 8);
	g_pkt_buffer[5] = (uint8_t)(g_uid>> 0);
	g_pkt_buffer[6] = 0;
	g_pkt_buffer[7] = 0;

	/* No BT/EDR - Tx only */
	g_pkt_buffer[8] = 2;
	g_pkt_buffer[9] = 0x01;
	g_pkt_buffer[10]= 0x04;

	/* append beacon packet */
	g_pkt_buffer[1]= BLE_PREFIX_SIZE+g_beacon_pkt_len;
	if(g_beacon_pkt_len)
 memcpy(
 &g_pkt_buffer[BLE_POSTFIX],
 g_beacon_pkt,
 g_beacon_pkt_len
 );

	/* set packet pointer */
	NRF_RADIO->PACKETPTR = (uint32_t)&g_pkt_buffer;

	NRF_RADIO->EVENTS_END = 0;

	/* start tracker TX */
	NRF_RADIO->TASKS_TXEN = 1;
	My_tasks_txen = NRF_RADIO->TASKS_TXEN;
	debug_printf("
Tasks_TXEN = %d
", My_tasks_txen);
}

void POWER_CLOCK_IRQ_Handler(void)
{
	/* always transmit proximity packet */
	if(NRF_CLOCK->EVENTS_HFCLKSTARTED)
	{
 /* acknowledge event */
 NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;

 /* start advertising */
 radio_send_advertisment();
	}
}

Reason for no Bluetooth signal?

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