[Solved] Help w/ RFM69 transmit code

EDIT: solved. Perhaps the wires were loose? It seems to be sending constantly now.

I’ve been having trouble getting the RFM69 library to work with a sender/receiver demo. I’ve decided to just simplify things and at least get a sender working without ack. I chop the “Node.ino” example to this small set of lines:

// Get the RFM69 and SPIFlash library at: https://github.com/LowPowerLab/

#include <RFM69.h>
#include <SPI.h>

#define NODEID        2    //unique for each node on same network
#define NETWORKID     100  //the same on all nodes that talk to each other
#define GATEWAYID     1
//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
//define FREQUENCY   RF69_433MHZ
//#define FREQUENCY   RF69_868MHZ
#define FREQUENCY     RF69_915MHZ
#define ENCRYPTKEY    "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!
#define IS_RFM69HW    //uncomment only for RFM69HW! Leave out if you have RFM69W!
#define ACK_TIME      30 // max # of ms to wait for an ack
#define SERIAL_BAUD   9600

RFM69 radio;

void setup() {
#ifdef IS_RFM69HW
  radio.setHighPower(); //uncomment only for RFM69HW!
  char buff[50];
  sprintf(buff, "\nTransmitting at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);

long lastPeriod = -1;

void loop() {
  Serial.println("in loop");
  radio.send(GATEWAYID, payload, 8);
  Serial.println("Send complete");

The output from the serial monitor is this:

Transmitting at 915 Mhz…
in loop

It looks like the send command never completes - like it’s hanging on the send command. What might be causing this?

I have the demo gateway running at the same time as this node sketch, but it shouldn’t matter right? I turn off ack?