CSS/Redirect Issue

Received following issue:

After i install the plugin the css just gone. Any idea why? Here is the link. Blessings and thank you
http://jesusanswersprayer.co.za/prayer/

Does the page in question load okay when the plugin is disabled? It seems the site is being redirected to a different address altogether and i can’t seem to find any call to amen files or procedures during the loading of the page.

http://wordpress.org/extend/plugins/amen/