how to config gk_twn2 to passed w3c validator

hi, i've implement gk_twn2 in my website at: http://www1.industry.go.th/industry and i have problem in validate with 3wc validator (http://validator.w3.org)
it show 27 Errors, 5 warning(s)

and i 've use http://demo.gavick.com/joomla25/twn2/ validate with http://validator.w3.org it return 5 Errors

please help me to config template to passed from w3c validating

thank you.

I have checked the report. The problem is that we use XHTML Transitional document source type, but at the same moment we use some html5 html elements, so the validator throws errors. But those errors should have no effect on the way site is rendering on any browser.