PHPBB3 Forum with WP-United (Vantage-Theme Premium)

Hi,
I hope someone can help me! I Use a PHPBB3 Forum (WP-United) with my Vantage Premium Theme.
www.blackedge.de
I have problems with the width of the forum-page. If i use the normal forum mode (not the mobile mode) the forum can’t adjust in to the blog.
The mobile-mode doesn’t work fine with the forum.
You can’t see the home-icon on the left side in the mobile-mode.
The footer from the forum isn’t visible.
Sry for my bad english!
Best regards

URL: http://www.blackedge.de