Hello, I cant open serial port.

Code:
#include <stdio.h>   /* Standard input/output definitions */
#include <string.h>  /* String function definitions */
#include <unistd.h>  /* UNIX standard function definitions */
#include <fcntl.h>   /* File control definitions */
#include <errno.h>   /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */


int main(int argc, char *argv[])
{
	int fd; /* File descriptor for the port */
	fd = open("/dev/ser1", O_RDWR | O_NOCTTY | O_NDELAY);
	if (fd == -1)
	{
		perror("open_port: Unable to open /dev/ser1 - ");
	}

	close(fd);
	return 0;
}

return: open_port: Unable to open /dev/ser1 - : Not enough memory

Please help :(