When I click in Magento Connect link in admistration, the link is downloading a file. The file content is:
if (version_compare(phpversion(), '5.2.0', '<')===true) {
echo '<div style="font:12px/1.35em arial, helvetica, sans-serif;"><div style="margin:0 0 25px 0; border-bottom:1px solid #ccc;"><h3 style="margin:0; font-size:1.7em; font-weight:normal; text-transform:none; text-align:left; color:#2f2f2f;">Whoops, it looks like you have an invalid PHP version.</h3></div><p>Magento supports PHP 5.2.0 or newer. <a href="http://www.magentocommerce.com/install" target="">Find out</a> how to install</a> Magento using PHP-CGI as a work-around.</p></div>';
exit;
}
require_once("lib/Mage/Autoload/Simple.php");
Mage_Autoload_Simple::register();
umask(0);
Maged_Controller::run();
How can I fix this trouble?