I tried adding a recommended piece of php to my plugin that

I tried adding a recommended piece of php to my plugin that i purched from you into the recommended php file (functions.php) and now my site is broken. I cannot login! neither can my site members! I used this recommended code: add_theme_support( ‘qa_style’ ); which came recommended from this page: where it talks about how you can customize the Q & A plugin to use your site's theme - instead of the default which looks like crap!, quite honestly. As per this recommendation, i can no longer login to my wordpress site. when i try entering my login credentials, i get the login error message.

UPDATE

I managed to find a backup functions.php file for my wordpress theme. So, I just replaced the broken one. But now, back to the issue with this Q&A plugin ... this is what that page currently looks like: . Just a form with some links kind of lost, i.e. looks like crap. So, how do I customize this? without breaking my site again?

I NEED HELP ASAP!