java.lang.ClassCastException: Application1 cannot be cast to Application2

I am getting the following error:

java.lang.ClassCastException: com.example.cillin.map.AuthenticationApplication cannot be cast to com.example.cillin.map.NBHAuthenticationApplication

This is the line where the error is marked:

NBHAuthenticationApplication myNBHApp = (NBHAuthenticationApplication) getApplication();

This is the class which that line is in:

import android.app.Activity;
import android.os.Bundle;

public class NBHBaseActivity extends Activity
{
    protected NBHAuthService mNBHAuthService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        NBHAuthenticationApplication myNBHApp = (NBHAuthenticationApplication) getApplication();
        myNBHApp.setCurrentNBHActivity(this);
        mNBHAuthService = myNBHApp.getNBHAuthService();
    }
}

And this is the NBHAuthenticationApplication class:

public class NBHAuthenticationApplication extends Application
{
    private NBHAuthService mNBHAuthService;
    private Activity mCurrentNBHActivity;

    public NBHAuthenticationApplication() {}

    public NBHAuthService getNBHAuthService() {
        if (mNBHAuthService == null) {
            mNBHAuthService = new NBHAuthService(this);
        }
        return mNBHAuthService;
    }

    public void setCurrentNBHActivity(Activity NBHactivity) {
        mCurrentNBHActivity = NBHactivity;
    }

    public Activity getCurrentActivity() {
        return mCurrentNBHActivity;
    }
}

Any ideas as to why this error is occuring? I have added the file to my manifest file as suggested in similar questions with this error but still no luck..

Manifest:

<application
        android:largeHeap="true"
        android:name="AuthenticationApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme" >


        <!--
             The API key for Google Maps-based APIs is defined as a string resource.
             (See the file "res/values/google_maps_api.xml").
             Note that the API key is linked to the encryption key used to sign the APK.
             You need a different API key for each encryption key, including the release key that is used to
             sign the APK for publishing.
             You can define the keys for the debug and release targets in src/debug/ and src/release/. 
        -->
        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key" />
        <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps" >

        </activity>
        <activity
            android:name=".MainMenu"
            android:label="@string/MainMenu" >

        </activity>
        <activity
            android:name=".CrimeInput"
            android:label="@string/MainMenu" >
        </activity>
        <activity
            android:name=".CoverPage"
            android:label="@string/MainMenu" >
        </activity>
        <activity
            android:name=".LoggedInActivity"
            android:label="LoggedIn" >
        </activity>
        <activity
            android:name=".RegisterAccountActivity"
            android:label="Register" >
        </activity>
        <activity
            android:name=".BaseActivity"
            android:label="Base" >
        </activity>
        <activity
            android:name=".AuthenticationActivity"
            android:label="Authentication" >
        </activity>
        <activity
            android:name=".NBHBaseActivity"
            android:label="Base" >
        </activity>
        <activity
            android:name=".CustomLoginActivity"
            android:label="Login" >
        </activity>
        <activity
            android:name=".Newsfeed"
            android:label="Login"
            android:windowSoftInputMode="adjustResize">
        </activity>
        <activity
        android:name=".NewsfeedInput"
        android:label="@string/MainMenu" >
    </activity>
        <activity
        android:name=".InfoWindowList"
        android:label="@string/MainMenu" >
    </activity>
        <activity
            android:name=".CrimeStats"
            android:label="@string/MainMenu" >
        </activity>
        <activity
        android:name=".GardaRegister"
        android:label="@string/MainMenu" >
    </activity>
        <activity
            android:name=".GardaLoginActivity"
            android:label="@string/MainMenu" >
        </activity>
        <activity
            android:name=".NeighborhoodRegister"
            android:label="@string/MainMenu" >
        </activity>
        <activity
            android:name=".NeighborhoodLogin"
            android:label="@string/MainMenu" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </>

</manifest>