Webdriver unable to find element

Question

I was unable to find the element (with id below) with Selenium even though it's visible in the html source page after successfully clicking on 'Search' button (using Selenium) of the previous page that has url as follows:

String url="https://sjobs.brassring.com/1033/ASP/TG/cim_advsearch.asp?partnerid=25314&siteid=5290";
driver.get(url);
if(driver.findElements(By.id("submit1")).size() != 0)
    driver.findElement(By.id("submit1")).click(); // clicking on 'Search' button
if(driver.findElements(By.id("ctl00_MainContent_GridFormatter_YUIGrid")).size() != 0)      
    System.out.println("FOUND!");

String pageSource= driver.getPageSource();

"FOUND!" was never rendered, nor pageSource contained the element with the above id. I am using Selenium 2.3.3 and testing with latest versions of IE, Chrome, and Firefox webdrivers. Could someone please help? Thank you.

About 1/3 from the bottom of the target page are the followings (third line is location of the id):

<div id="ctl00_MainContent_GridFormatter_datatable" class="datatable">
<div id="THeadersDiv" style="display:none;">
<table id="ctl00_MainContent_GridFormatter_YUIGrid" class="basicGrid" border="0"> <!-- this is the element in question -->

Answer 1

I think I got it. I believe that the driver cannot find the element because there are two elements both with identical IDs. (which is terrible web code). I looked at the rest of the code, and it looks like the two elements also share the same class, and are the only two elements with that class.

Therefore, I believe that doing a By.className(".basicGrid") should work