Tidy Common Problems!

Hi  Sir, I am on a project of converting HTML to XHTML recently. In vs2010, I started writing programs to run, this is a test. In the tidy.h example, is noted. I added library file, there are several projects with library files and so on.
Here is the code:  Ran successfully. 
 Results are as follows:Files after conversion, apparently, is the header file, unlike the second inside is starting with the XML declaration. 
This function also has a problem. where goes wrong?
My customer owns this site: https://www.transferrecovery.com, which contains some basic bugs that violation of w3 standard even though I have tried to fix.Thanks a lot!-- 
Ker Web Tech (Kaysmart)https://twitter.com/francos9000