Java-android-chyba v Trace-oprava??

Mam chybu někde v MainActivity, ale nevim kde, a hledání pomocí googlu nepomohlo, když tam radili řešení, tak jsem to tam bud měl, nebo to nepomohlo... nějaké vaše rady???
Log: error opening trace file: No such file or directory (2)
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import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
	Boolean isInternetPresent = false;
	ConnectionDetector cd;
	
	

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Button button1 = (Button) findViewById(R.id.button1);

		// creating connection detector class instance
		cd = new ConnectionDetector(getApplicationContext());
       
    	
        
		
		button1.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				
				// get Internet status
				isInternetPresent = cd.isConnectingToInternet();

				// check for Internet status
				if (isInternetPresent) {
					// Internet Connection is Present
					// make HTTP requests
					showAlertDialog(MainActivity.this, "Internet Connection",
							"You have internet connection", true);
				} else {
					// Internet connection is not present
					// Ask user to connect to Internet
					showAlertDialog(MainActivity.this, "No Internet Connection",
							"You don't have internet connection.", false);
				}
			}

		});
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
    /** Called when the user clicks the check connection button */
    public void checkConnection(View view) {
        
    }
    
    
	public void showAlertDialog(Context context, String title, String message, Boolean status) {
		AlertDialog alertDialog = new AlertDialog.Builder(context).create();

		// Setting Dialog Title
		alertDialog.setTitle(title);

		// Setting Dialog Message
		alertDialog.setMessage(message);
		
		// Setting alert dialog icon
		alertDialog.setIcon((status) ? R.drawable.success : R.drawable.fail);

		// Setting OK Button
		alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
			public void onClick( DialogInterface dialog,  int which) {
			}
		});

		// Showing Alert Message
		alertDialog.show();
	}
}