How did you install - did u perform the QuickStart installation method as described in the manual?
This template is used by dozens of other users without problems - if you require help first be a little less aggressive..
comments like "Support, please, I pay my money for this exellent template, but what you doing?" on your first post are out of order....
Personally I would try a complete re-install by the quickstart method... this will prove whether something went wrong during the install or if it is a server related problem - it is just a Joomla/Virtuemart install - there should be no reason for these problems..
have you checked your server error logs?
have you tried with Joomla debug switched on etc..
There are many things you can try that will give us some info as to what the problem is...
if I open your link the 1st time and look at the source code the head is being rendered after the body tag!!!!
<html lang="en-gb" dir="ltr">
<head>
<m-eta charset="utf-8">
<m-eta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
<s-tyle type="text/css">
</head>
<body id="page" class="page isblog " data-config="{"twitter":0,"plusone":0,"facebook":0}">
<jdoc:include type="head">
<l-ink href="/templates/flexible_darkmart/apple_touch_icon.png" rel="apple-touch-icon-precomposed">
<s-tyle>
<l-ink type="text/css" rel="stylesheet" href="http://76.162.125.10/templates/flexible_darkmart/css/font1/lucida.css">
<l-ink type="text/css" rel="stylesheet" href="http://76.162.125.10/templates/flexible_darkmart/css/font2/fjalla_one.css">
<l-ink type="text/css" rel="stylesheet" href="http://76.162.125.10/templates/flexible_darkmart/css/font3/fjalla_one.css">
<l-ink href="/cache/template/gzip.php?template-14e4f730.css" rel="stylesheet">
<s-cript id="facebook-jssdk" src="//connect.facebook.net/en_US/all.js#xfbml=1&appId=115329165206253">
<s-cript src="/cache/template/gzip.php?template-2161f04c.js">
<s-cript type="text/javas-cript">
<div class="bg-background-gradient">
</jdoc:include>
</body>
</html>
compare your source with
http://flexiblewebdesign.com/virtuemart-2-template-darkmart/
something is wildly wrong with your install - I would re-install..