Website turns into white screen when I activate buddy press social theme

Hi ,
Im New here as per the tutorial specified in the theme file I have installed buddypress social theme in /public_html/wp-content/themes which consist of( bp-social )and (bp-social-child)

Now under site admin mode and I have activated Buddy Press social child theme

Then I came to Appearance ->Themes and when I click Activate buddypress child them my website turns into white page no idea what is wrong .

Please help me !

Im using WordPress MU 2.9.2