Error: Could not find or load main class org.testng.remote.R

Error: Could not find or load main class org.testng.remote.RemoteTestNG


Module 9:New topics:
Putting Dataproviders for multiple tests in a single file

i used following code:

package L1;
import org.testng.annotations.Test;
import org.testng.remote.RemoteTestNG

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import org.testng.annotations.Test;
public class TestLogin {
@Test(dataProviderClass=Parameterz12.class,dataProvider="Parameter")
public void LogHimin(String LoginName,String Password )
{

System.out.println("LoginName" +LoginName+ "Password" +Password );


}


@Test(dataProviderClass=Parameterz12.class,dataProvider="Parameter1")
public void Matchcouple(String guy,String gal )
{

System.out.println("guy" +guy+ "gal" +gal );


}




}
===========================================
package L1;
import java.lang.reflect.Method;
import org.testng.remote.RemoteTestNG

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class Parameterz12 {
@DataProvider(name="DP1")
public static Object[][] Parameter( )
{

Object[][] data=new Object[4][2];
data[0][0]="chaitra";
data[0][1]="chaitra1";
data[1][0]="spoorthi";
data[1][1]="spoorthi1";
data[2][0]="shruthi";
data[2][1]="shruthi1";
data[3][0]="preethi";
data[3][1]="preethi1";
return data;
}

@DataProvider(name="DP2")
public static Object[][] Parameter1( )
{

Object[][] data1=new Object[4][2];
data1[0][0]="chaitra";
data1[0][1]="kiran";
data1[1][0]="spoorthi";
data1[1][1]="javagal";
data1[2][0]="shruthi";
data1[2][1]="shashank";
data1[3][0]="preethi";
data1[3][1]="pavan";
return data1;
}
}

on RunAS:
i get Error: Could not find or load main class org.testng.remote.RemoteTestNG
PLease help me resolve this ....