Ohh Sorry !
I have made a mistake lol
I thought you needed help on the forum....
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Well do this
<table border="1" align="center" valign="bottom" cellspacing="1" id="ll"><tbody>
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Also it might be caused if you are placing this Link Box in one of the tables with those Banners.
So probably include a Break and then insert your Link Box code.

And I would suggest you to do XHTML & CSS Valid because you are learning Web Designing though