Unabled to edit device group

I am getting this error while I'm trying to add or edit device group
PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'b.parent' in 'field list': SELECT b.parent AS parent FROM {browscap} b GROUP BY parent ORDER BY parent ASC; Array ( ) in mobile_tools_browscap_get_browscap_parents() (line 139 of /home/daksh/public_html/mysite.com/sites/all/modules/mobile_tools/mobile_tools_browscap/mobile_tools_browscap.module).

My browscap version 7.x-2.0. I have checked http://drupal.org/node/1759968 but that patch dose not work for 7.x-2.0