problem in executing selenium RC in internet Explorer?

hi,
I am a beginner in seleniumRC,I started with recording scripts in selenium-ide then copy script in Eclipse, it is running sucessfully in firefox with the given below code .
import com.thoughtworks.selenium.*;
public class logintest extends SeleneseTestCase {
public void setUp() throws Exception {


setUp("http://www.ourgoalplan.com/", "*firefox");
}
public void testUntitled2() throws Exception {
selenium.open("/Login.aspx");
selenium.type("txtName", "komalr");
selenium.type("txtPassword", "komalrana789");
selenium.click("btnLogin");
selenium.waitForPageToLoad("30000");
selenium.click("ucGPSMenu_hlnkWeeklyGoal");
selenium.waitForPageToLoad("30000");

}}


but to execute using iexplorer,I am using.

public class logintest extends SeleneseTestCase {
public void setUp() throws Exception {


setUp("http://www.ourgoalplan.com/", "*iexplore");
}
or
setUp("http://www.ourgoalplan.com/", "*iehta");
but these code are not working error is generate
i am sending screen shot of the same error.
i am using IE-8 and window7.
Plz,plz, help me out.

Thanks
(in advance)

Hi,
Did u try in other OS ..i mean other than Windows 7

I tried it in window xp also