Problem with SD library and opening files.[solved]

Using Arduino Storage
1

Hi all,

Im currently building a gps logger. Im having trouble with writing the gps data to the SD card. The code always has a problem writing/opening to the file. I have used the datalogger example in the Arduino IDE and it works all fine. After the line: File dataFile = SD.open("log.txt", FILE_WRITE); the program will turn on the red led pin 6, instead of writing any data to the SD card.

Could anybody suggest why my code is not working?

#include <SoftwareSerial.h>
#include <TinyGPS.h>
#include <SD.h>

//3(rx) and 4(tx). for gps.

TinyGPS gps;
SoftwareSerial ss(3, 4);

Sd2Card card;
SdVolume volume;
SdFile root;
const int chipSelect = 10;

unsigned long time, duration;

void setup()
{
  duration=300000;//5 minutes
  Serial.begin(115200);
  ss.begin(9600);

  pinMode(6, OUTPUT); //red led
  pinMode(7, OUTPUT); //green led


  if (!card.init(SPI_QUARTER_SPEED, chipSelect)) {
    Serial.println("initialization failed.");
    digitalWrite(6, HIGH);//turn led red
    return;
  } 

  else {
   Serial.println("Wiring is correct and a card is present.");
   digitalWrite(7, HIGH);//led green 3 seconds
  delay(3000);
  digitalWrite(7, LOW);
}
}

void loop()
{
time=millis();
  if(time<duration){///&&//switch active
  bool newData = false;  
newData=gpsSetup(newData); 

if (newData)
  {
    long lat, lon;
    unsigned long age,time,date,speed,alt;
    gps.get_position(&lat, &lon, &age);
    gps.get_datetime(&date,&time);
    speed=gps.speed();
    alt=gps.altitude();
    
/*
    Serial.print("LAT=");
    Serial.print(lat);
    Serial.print(" LON=");
    Serial.print(lon);
    Serial.print(" AGE=");
    Serial.print(age);
    Serial.println();*/

   File   dataFile = SD.open("log.txt", FILE_WRITE);

    if (dataFile){
      dataFile.print("test");
      //dataFile.print(" ");
      //dataFile.println(lon);
      dataFile.close();
      digitalWrite(7, HIGH); //quick flash of led to tell if data has been written?
     delay(50);
     digitalWrite(7, LOW);
    }  

    else {
      digitalWrite(6, HIGH);//error opening file
    }

  
 
 

  //quick flash of led to tell if data has been written?

  }}
  
  
  else{
}


/////////function definitons////////////

bool gpsSetup(bool newData){
  for (int i=0;i<1000;i++){
    while (ss.available()){
        char c = ss.read();
        if (gps.encode(c)) // Did a new valid sentence come in?
          newData = true;
    }
  }
  return newData;
}

Thanks, help much appreciated.

edit: forgot SD.begin