unable to start intent in android?

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Mobile

Android

Eclipse

while starting a new service i have used

startService(new Intent(this, ser.class);

n m getting error in log cat unable to start intent in android.


demoseractivity.java

package com;

import com.demoser.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class demoserActivity extends Activity implements OnClickListener {
	private static final String TAG = "ServicesDemo";
	  Button buttonStart, buttonStop;

	  @Override
	  public void onCreate(Bundle savedInstanceState) {
		  super.onCreate(savedInstanceState);
	    setContentView(R.layout.main);

	    buttonStart = (Button) findViewById(R.id.buttonStart);
	    buttonStop = (Button) findViewById(R.id.buttonStop);

	    buttonStart.setOnClickListener(this);
	    buttonStop.setOnClickListener(this);
	  }

	  public void onClick(View src) {
	    switch (src.getId()) {
	    case R.id.buttonStart:
	      Log.d(TAG, "onClick: starting srvice");
	      startService(new Intent(this, ser.class));
	      break;
	    case R.id.buttonStop:
	      Log.d(TAG, "onClick: stopping srvice");
	      stopService(new Intent(this, ser.class));
	      break;
	    }
	  }
	}

ser.java

package com;

import com.demoser.R;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
import android.R.layout.*;
import android.app.Activity;
import android.content.ContentValues;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;

public class ser extends Service

{
	private static final String TAG = "MyService";
MediaPlayer player;
@Override
public IBinder onBind(Intent intent) {
return null;
}

public void onCreate(Bundle savedInstanceState) {
    super.onCreate();
  //  setWallpaper(R.drawable.ic_launcher);
	Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
	Log.d(TAG, "onCreate");
	player = MediaPlayer.create(this, R.raw.demo);
	player.setLooping(false); // Set looping
}

	
@Override
public void onDestroy() {
	Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
	Log.d(TAG, "onDestroy");
	player.stop();
}

public void onStartCommand(Intent intent, int startid) {
	Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
	Log.d(TAG, "onStart");
	player.start();
}
}

main.xml just has two buttons

and manifest has

service enabled="true" android:name=".ser"

inside application tag