InternetExplorerDriver working on some websites but not on others in the same machine

Hi

I have Windows Vista machine with IE version 8.0

I am using selenium 2.0 InternetExplorerDriver to write tests. The InternetWebDriver works fine for tests on some websites but for some other websites drivers seems to not work and always tells not able to find element. why is it so? Infact i am using same methods like "findelement(By.name("xxx")) for both the tests on the both the websites.

I have even unchecked protected mode in my ie's security tab and added to trustworthy sites the sites under consideration.


Any help?

Thanks,
Premila

What is
1 the OS and
2. IE version
on the second machine?

Also,
3. Are the two sites (aut), the same?

Actually, i am talking about one machine only. It is windows vista with ie8.0.
The driver involved in the test is internetexplorerdriver. Language is java.

For eg., consider the below for yahoo
driver=new InternetExplorerDriver();
driver.get(http://www.yahoomail.com/);
element=driver.findElement(By.name("login");element.sendKeys("abc");

For this test, i get the following error,

FAILED. Unable to find element with name == login (WARNING: The server did not provide any stacktrace information)
System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.6.0_23'
Driver info: driver.version: RemoteWebDriver

But similar piece of code on some other website say walmart.com,
driver=new InternetExplorerDriver();
driver.get(http://www.walmart.com/);
element=driver.findElement(By.name("search_query"));element.sendKeys("abc");

This code on this site works well and passes.

Anyone know the reason for this? That is, internetexplorerdriver working on some websites but not on some others.