Can’t install BuddyPress

I’m using the latest version of AnsPress, AnswerBox Theme, and BuddyPress. I go to install BuddyPress and get this error:

Fatal error: Class ‘BP_XProfile_Field_Type’ not found in … / plugins/buddypress-xprofile-custom-fields-type/classes/Bxcft_Field_Type_Birthdate.php on line 8

I tried installing the buddypress xprofile plugin but get the same result (that’s why the path isn’t going to the theme dir ^).