Get Eclipse for card recognition api

Hi I am developing an android app and am trying to include maps in one of my routines. Following all instructions from Android my java file will not recognize "MapActivity" or import statements to enable the required api. Here is my XML manifest and my class file.

<?xml version="1.0" encoding="utf-8"?>

      

        
        
        
      

    

  <uses-permission android:name="android.permissions.INTERNET"/>
  <uses-permission android:name="android.permissions.ACCESS_FINE_LOCATION"/>

<application android:icon="@drawable/icon" android:label="@string/app_name">

 <uses-library android:name="com.google.android.maps" />  

    <activity android:name=".CadetCommand"
              android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name="RedLight"></activity>
    <activity android:name="PTCalculator"></activity>

</application>
<uses-sdk android:minSdkVersion="7"/>

      

        
        
        
      

    

here is my java file:

    package edu.elon.cs.mobile;

import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import android.os.Bundle;

public class LandNav extends MapActivity{

}

      

        
        
        
      

    

Any suggestion would help.