Multiple Views Not Displaying in Custom Alert Dialog Box

Edit: Lesson learned: set orientation or material may not be displayed.

By http://developer.android.com/guide/topics/ui/dialogs.html#CustomDialog I am trying to create a custom alert dialog. In particular, I am creating a dialog that contains several views (called HelpItemView), each of which contains two text images. I use this to create an alert dialog containing help information in the form of title-content pairs.

My problem is that only the first HelpItemView appears, although I create a bunch of them. Is there something in the warning dialog that limits this? I mixed up with my code and did not experience problems with all HelpItemViews appearing when they were attached to the main linear layout of my activity, it seems that this problem appears only in the warning dialog.

Code inside my activity:

private void createHelp() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    Resources res = getResources();
    LinearLayout help_root = (LinearLayout)getLayoutInflater().inflate(R.layout.help_frame, null);
    LinearLayout help = (LinearLayout) help_root.findViewById(R.id.helpGroup);
    help.addView(new HelpItemView(this, res.getString(R.string.help_main_welcome), 
            res.getString(R.string.help_main_welcome_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.add_id), 
            res.getString(R.string.help_add_id_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.view_ids), 
            res.getString(R.string.help_view_ids_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.view_map), 
            res.getString(R.string.help_view_map_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.browse_plants), 
            res.getString(R.string.help_browse_plants_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.btnQuickIdentification), 
            res.getString(R.string.help_btnQuickIdentification_content)));
    help.addView(new HelpItemView(this, res.getString(R.string.btnOptions), 
            res.getString(R.string.help_options_content)));
    builder.setView(help_root);
    AlertDialog alert = builder.create();
    alert.show();   
}

helpframe.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ScrollView android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/helpGroup"></LinearLayout>
</ScrollView>
</LinearLayout>

HelpItemView.java

public class HelpItemView extends RelativeLayout {
private TextView m_vwItemTitle;
private TextView m_vwItemText;

public HelpItemView (Context context, String header, String content) {
    super(context);
    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    inflater.inflate(R.layout.help_item, this, true);
    m_vwItemTitle = (TextView) this.findViewById(R.id.helpItemHeader);
    m_vwItemText = (TextView) this.findViewById(R.id.helpItemText);
    setContent(header, content);
}

private void setContent(String header, String content) {
    m_vwItemTitle.setText(header);
    m_vwItemText.setText(content);
}

}

help_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dip">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/helpItemHeader"
android:textSize="20sp"
android:textStyle="bold"
android:layout_gravity="center"
></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/helpItemText"
/>
</LinearLayout>

Maybe this is something dumb, and I'll just skip it, I don't know. Any thoughts / help would be most appreciated. Oh, I'm developing on Android 1.6, if that matters. I am open to converting to a list if this works better (or at all), but I would still like to know what is wrong with the current code if someone can figure it out.