Android : Relative layout looks ok in Eclipse, but not on device

I have the following layout. It looks ok when I view it within the graphical layout view in Eclipse. But when on a phone, this is not reflected.

On a phone the TextView rowlogmessage takes up the whole view and the other TextViews are crushed at the bottom.

Any ideas why?

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/rounded_corners_white" >

    <TextView
        android:id="@+id/rowlogmessage"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="log message goes here"
        android:textColor="#707070"
        android:layout_alignParentTop="true" />

    <TextView
        android:id="@+id/rowlogcreatedat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="log message created at"
        android:textColor="#707070"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true" />

    <TextView
        android:id="@+id/rowlogcreatedatlabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Created at"
        android:layout_alignParentLeft="true"
        android:layout_above="@id/rowlogcreatedat"
        android:paddingTop="10dp" />

    <TextView
        android:id="@+id/rowlogsentserver"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="log message sent to server"
        android:textColor="#707070"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true" />

    <TextView
        android:id="@+id/rowlogsentserverlabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Sent to server"
        android:layout_alignParentRight="true"
        android:layout_above="@id/rowlogsentserver"
        android:paddingTop="10dp"/>

</RelativeLayout>