Apps can not find TextView in PreferenceActivity

[vovs]

Hi, guys. In my PreferenceActivity I have some Preferences. One I inflate from layout:

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.layout.settings);
...
}

protected void onResume() {     
        super.onResume();
Preference registrationStatus = (Preference) findPreference("registrationStatusPref");
 if (!TextUtils.isEmpty(somestring){
            registrationStatus.setLayoutResource(R.layout.push_reg_status);
            TextView push_reg_status_txt = (TextView)findViewById(R.id.pushRegTxtPref);
 }
....
}

push_reg_status_txt is TextView from push_reg_status layout, and push_reg_status always is null.

push_reg_status layout

....
<TextView
        android:id="@+id/pushRegTxtPref"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="2dp"
        android:layout_marginBottom="4dp"
        android:text="Registration Succesful"
        android:textColor="#99ff33"
        android:gravity="center_horizontal"
        android:layout_gravity="center_horizontal"/>
.....

Why?