Listview不能上下滚动了？？？

为什么我在TabHost里放入Listview 出来的数据却不能上下滚动了？
布局代码：
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tabh_lay1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
 
    <LinearLayout
        style="@style/activitys"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
 
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
 
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:fadingEdge="none"
            android:fadingEdgeLength="0dp" >
 
            <LinearLayout
                android:id="@+id/tabh_lay11"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="horizontal" >
 
                <ListView
                    android:id="@+id/week_one_list"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:cacheColorHint="#00000000" >
                </ListView>
            </LinearLayout>
 
            <LinearLayout
                android:id="@+id/tabh_lay12"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical" >
 
                <ListView
                    android:id="@+id/week_two_list"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:cacheColorHint="#00000000" >
                </ListView>
            </LinearLayout>
 
            <LinearLayout
                android:id="@+id/tabh_lay13"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical" >
 
                <ListView
                    android:id="@+id/week_three_list"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:cacheColorHint="#00000000" >
                </ListView>
            </LinearLayout>
 
            <LinearLayout
                android:id="@+id/tabh_lay14"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical" >
 
                <ListView
                    android:id="@+id/week_four_list"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:cacheColorHint="#00000000" >
                </ListView>
            </LinearLayout>
 
            <LinearLayout
                android:id="@+id/tabh_lay15"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical" >
 
                <ListView
                    android:id="@+id/week_five_list"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:cacheColorHint="#00000000" >
                </ListView>
            </LinearLayout>
        </FrameLayout>
    </LinearLayout>
 
</TabHost>