selenium.isTextPresent() and selenium.isElementPresent() are NULL

I'm running the following code:

Code:


package com.testScripts;


import com.thoughtworks.selenium.SeleneseTestCase;
import junit.framework.*;



public class TestSelenium extends SeleneseTestCase {
 
        public void setUp() throws Exception  {
           setUp("http://www.google.com/", "*firefox");   
        }
 
        public void testDummyFunction() throws Exception {
           selenium.open("/");
          selenium.type("q", "red sox");
          selenium.click("btnG");
          assertTrue(selenium.isTextPresent("red sox"));
          

        }
}


But everytime I try to use something like selenium.isTextPresent() or selenium.isElementPresent(), it always returns null. I can't find a solution... I've referenced all the necessary libraries and files as well. If I take out the assertTrue() statement in the code above, there is no problem.