parse.com has stooped working when doing signup?

package alexgwartney.parseproject;

import android.app.AlertDialog;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.parse.Parse;
import com.parse.ParseException;
import com.parse.ParseUser;
import com.parse.SignUpCallback;


public class signupactivity extends ActionBarActivity {

    protected EditText mUsername;
    protected EditText mPassword;
    protected EditText mEmail;
    protected Button mSingnUpButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_signupactivity);

        mUsername = (EditText) findViewById(R.id.usernamefield);
        mPassword = (EditText) findViewById(R.id.passwordfeild);
        mEmail = (EditText) findViewById(R.id.emailfield);
        mSingnUpButton = (Button) findViewById(R.id.signupbutton);

        mSingnUpButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String username = mUsername.getText().toString();
                String password = mPassword.getText().toString();
                String email = mPassword.getText().toString();

                username.trim();
                password.trim();
                email.trim();

                if(username.isEmpty() || password.isEmpty() || email.isEmpty()){
                    AlertDialog.Builder builder = new AlertDialog.Builder(signupactivity.this);
                    builder.setMessage(R.string.Signuperror)
                    .setTitle(R.string.SignuperrorTitle)
                    .setPositiveButton(android.R.string.ok,null);

                    AlertDialog dialog = builder.create();
                    dialog.show();
                }else{
                    ParseUser user = new ParseUser();
                    user.setUsername(username);
                    user.setPassword(password);
                    user.setEmail(email);

                    user.signUpInBackground(new SignUpCallback() {
                        @Override
                        public void done(ParseException e) {
                              if(e == null){
                                  Intent intent = new Intent(signupactivity.this,MainActivity.class);
                                  startActivity(intent);
                                  intent.addFlags(intent.FLAG_ACTIVITY_NEW_TASK);
                                  intent.addFlags(intent.FLAG_ACTIVITY_CLEAR_TASK);
                                  startActivity(intent);
                              }else{

                              }
                        }
                    });

                }
            }
        });
    }


}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="alexgwartney.parseproject" >


    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" android:name=".parseapplication" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".LogInActivity"
            android:label="@string/title_activity_log_in" >
        </activity>
        <activity
            android:name=".signupactivity"
            android:label="@string/title_activity_signupactivity"
            android:parentActivityName=".LogInActivity"
            >

        </activity>
    </application>

</manifest>

package alexgwartney.parseproject;

import android.app.Application;

import com.parse.Parse;

/**
 * Created by alex on 6/27/2015.
 */
public class parseapplication extends Application{
    @Override
    public void onCreate(){
        super.onCreate();

        Parse.enableLocalDatastore(this);

        Parse.initialize(this, "E5tyxQDVFwAutEwG8yIJv06QuJ860F17n5I0HN82", "lpMNMuS8O7Uaf1AWoXvp9ohsq3sxoAFBisAG5bwy");
    }

}