intent filter not working

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Mobile

Android

hi,
in my android application i have two activities.
i want to use intent filter to set default launcher activity,but it invoke always my first created activity.
my Manifest.xml code is like this:

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    package="com.example.app1"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk>
        android:minSdkVersion="10"
        android:targetSdkVersion="19" />

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

whats wrong in it.
please help.
thanks.