eCommerce (500 Internal Server Error)

Hello dear colleagues!

I have following problem, when you install and activate the WP-eSommerce site “throws” a 500 error (Internal Server Error) (phpinfo here: http://gw.media-2.ru/test.php), I saw on your forum (http://ww.wp.xz.cn/support/topic/plugin-wp-e-commerce-error-500-when-activating?replies=3), this information did not help, in htaccess after adding in, I see after activate the source code plugins.php in my browser (in text).

Please accomplish, or give a link where this problem is described and solved.

I have full access, if necessary I can change the configuration of Apache.

Thank you!