Horizontal Linearlayout changing button and edittext from position

Horizontal Linearlayout changing button and edittext from position

Here the onSubmit event works...
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:weightSum="4"
android:orientation="horizontal" >
<Button
android:id="@+id/buttonSubmit"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:onClick="onSubmit"
android:text="@string/ok" />
<EditText
android:id="@+id/inputLicenseplate"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="3"
android:hint="@string/your_licenseplate"
android:text=""
android:inputType="textCapCharacters"
android:textAppearance="?android:attr/textAppearanceLarge" >
<requestFocus />
</EditText>
</LinearLayout>
However, when I simply change it from position... it does not work anymore
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:weightSum="4"
android:orientation="horizontal" >
<EditText
android:id="@+id/inputLicenseplate"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="3"
android:hint="@string/your_licenseplate"
android:text=""
android:inputType="textCapCharacters"
android:textAppearance="?android:attr/textAppearanceLarge" >
<requestFocus />
</EditText>
<Button
android:id="@+id/buttonSubmit"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:onClick="onSubmit"
android:text="@string/ok" />
</LinearLayout>
Extra info: Root layout is a RelativeLayout
What/Why/How/WTF is wrong with this?