Center a TextView: Why it doesn't work?

Center a TextView: Why it doesn't work?

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:textColor="@color/red"
android:textStyle="bold"
android:text="@string/desc"
/>
<TextView
android:id="@+id/textView2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textStyle="bold|italic"
android:text="Welcome"
android:textAppearance="?android:attr/textAppearanceLarge"
/>
</RelativeLayout>
I would like to center the second TextView but I can not ... This is the
code, you know help me? Where is the error? I'm going crazy!