Boris,
Here's a few ideas:
First of all, XML requires that all tags have a corresponding closing tag, so follow the <input> with </input>. That should take care of three of the errors (#2, #5, and #8).
Secondly, it seems as though XML also does not like for any text to exist outside of some sort of wrapper. Normally, this would apply to the body text having something like:
<body>
Hello, World!
</body>
XML wants it to look like this:
<body>
<div>
Hello, World!
</div>
</body>
Actually, you can wrap the text in any of a number of tags ("p", "h1", "h2", "h3", "h4", "h5", "h6", "div", "pre", "address", "fieldset", "ins", or "del"), just so long as there is no text left to itself.
That being said, you probably (for some odd reason) must do the same thing in your <form></form> tags. Try placing a generic <div> inside the <form> tags, around the <input> tags. That should fix errors 1, 4, and 7.
You'll have to fill in your own code, but it'll look something like this:
<form>
<div>
<input></input>
<input></input>
<input></input>
</div>
</form>
Errors 3, 6, and 9 are just telling you where it found the other errors, and should disappear when you fix the other two things.
Hope that takes care of it!