Layouts, bottom position

Hello, im trying to put my horizontal linear layout at bottom possition, but it keeps staying under last component, take a loook:

Would be great if someone can tell me whats wrong, thanks in advance.

Could you please show your XML code?

BR,

Hélio Padrão"

Here it is:

<?xml version="1.0" encoding="utf-8" ?> 
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:weightSum="1">
  <TextView android:textAppearance="?android:attr/textAppearanceLarge" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/textView1" android:text="@string/integerText" /> 
- <EditText android:layout_height="wrap_content" android:id="@+id/editText1" android:layout_width="match_parent" android:inputType="number" android:editable="false" android:enabled="true" android:focusable="false">
  <requestFocus /> 
  </EditText>
  <Button android:layout_height="wrap_content" android:id="@+id/button1" android:layout_width="match_parent" android:text="@string/findText" /> 
  <Button android:layout_height="wrap_content" android:id="@+id/button2" android:layout_width="match_parent" android:text="@string/infoText" /> 
- <LinearLayout android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:orientation="vertical" android:layout_width="match_parent" android:layout_gravity="center_vertical">
- <LinearLayout android:id="@+id/linearLayout2" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_gravity="center_horizontal">
  <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/button0" android:id="@+id/btn0" /> 
  <Button android:text="@string/button1" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn1" /> 
  <Button android:text="@string/button2" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn2" /> 
  <Button android:text="@string/button3" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn3" /> 
  <Button android:text="@string/button4" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn4" /> 
  <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/button5" android:layout_gravity="center_vertical" android:id="@+id/btn5" /> 
  </LinearLayout>
  </LinearLayout>
- <LinearLayout android:layout_height="wrap_content" android:id="@+id/linearLayout3" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_gravity="center_horizontal">
  <Button android:text="@string/button6" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn6" /> 
  <Button android:text="@string/button7" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn7" /> 
  <Button android:text="@string/button8" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn8" /> 
  <Button android:text="@string/button9" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btn9" /> 
  <Button android:text="@string/buttonDel" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/btnDel" /> 
  </LinearLayout>
  <LinearLayout android:layout_height="wrap_content" android:orientation="vertical" android:layout_width="match_parent" android:id="@+id/linearLayout4" android:layout_gravity="bottom" android:layout_weight="0.26" /> 
  </LinearLayout>