Silverlight Textbox Focus Issue ?

Question

I have a HTML input box in a page.

I have a silverlight textbox inside a Iframe in the same page.

Once the page is loaded, I started entering data in HTML textbox.

After that, when I click the silverlight text box to enter data, focus is not coming there.

Focus still present in the HTML text box.

Only the cursor blinks in the silverligth text box, but the data is entered in the HTML input box.

How to get the focus on silverlight textbox ?