Tags can't be capital letters. Change TITLE to title for example.
Anyways, that error tells you exactly what's wrong.
Code:
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").
Looking at your code, you have a <b> on line 40 and it's closed on line 135. You can't have a div inside a b. b is inline and div is block. You're trying to boldify a div, which is undefined behavior. Remove the b and the closing b and it validates. You should put the b tags around all the individual bits of text you want boldified.
It only validates as HTML though. You should really try to get it to validate as XHTML. Actually I was wrong, I don't think you even need to close all your tags in HTML, like I said above, or make all your tags lowercase either; I was assuming you were going for XHTML. XHTML is the GOOD standard. It's not hard to get it to that level either. Replace your b's with strong's and your i's with em's, and stuff like that.