Tag <activity> attribute name has invalid character &# ...

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.rda.sayfagecisi"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity android:name="com.rda.SayfaGecisi.MainActivity" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

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

            </intent-filter>

        </activity>

        <activity android:name="com.rda.SayfaGecisi.İkinciActivity" >

       Buraya ; Tag <activity> attribute name has invalid character '0'. Hatası veriyor

 </activity>

    </application>

</manifest>

Manifest dosyamda üsteki gibi hata veriyor nereyi yanlış yapıyorum. Activitylerim hata vermiyor