Actually, the code that Shinu gave you is working. As you can see on the test page I have attached to this message, it works like charm. In your details, I can see that you are using the latest version of RadControls - 2009.1 402, but if you are using a pre-Q1.2009 version, this fix will not work, because we have changed the naming conventions of the CSS classes. If you are with an older version of the controls, use FireBug or Internet Explorer Developer Toolbar to get the old CSS classes and change the CSS respectively.
the Telerik team