Help! Paypal integration not working

Fatal error: Uncaught exception ‘Exception’ with message ‘Preapproval failed: Authentication failed. API credentials are incorrect.’ in /home/webis132/public_html/kickstartireland.com/wp-content/themes/funding_press/funding/paypal.php:100 Stack trace: #0 /home/webis132/public_html/kickstartireland.com/wp-content/themes/funding_press/funding/funding.php(217): F_PayPal->get_auth_url(Object(WP_Post), Object(WP_Post), Object(WP_Post)) #1 [internal function]: F_Controller->action_template_redirect(”) #2 /home/webis132/public_html/kickstartireland.com/wp-includes/plugin.php(429): call_user_func_array(Array, Array) #3 /home/webis132/public_html/kickstartireland.com/wp-includes/template-loader.php(12): do_action(‘template_redire…’) #4 /home/webis132/public_html/kickstartireland.com/wp-blog-header.php(16): require_once(‘/home/webis132/…’) #5 /home/webis132/public_html/kickstartireland.com/index.php(17): require(‘/home/webis132/…’) #6 {main} thrown in/home/webis132/public_html/kickstartireland.com/wp-content/themes/funding_press/funding/paypal.php on line 100