Problem activating edu-clean-child

Hi,

We are having problems activating the edu-clean-child theme, our error log shows:

"PHP Fatal error: Cannot redeclare bp_dtheme_ajax_querystring() in /wp-content/themes/edu-clean/_inc/ajax.php on line 20"

Platform: WordPress MU 3.0, BP 1.2.5.2

Looking forward to your response.