Error 500 in module admin. When i login as admin, everything is ok, but when
other backend users are trying to open module backend - module is falling down
with error 500. Server log below:

PHP Fatal error:  Uncaught Exception: Result set does not exist in
/html/modules/CompanyDirectory/lib/class.cd_company_query.php:757
Stack trace:
#0 /html/modules/CompanyDirectory/function.admin_companiestab.php(92):
cd_company_query->get_results('m1_', '')
#1 /html/modules/CompanyDirectory/action.defaultadmin.php(64):
include('/var/www/suprot...')
#2 /html/lib/classes/class.CMSModule.php(1403): include('/var/www/suprot...')
#3 /html/modules/CGExtensions/CGExtensions.module.php(587):
CMSModule->DoAction('defaultadmin', 'm1_', Array, '')
#4 html/lib/classes/class.CMSModule.php(1479):
CGExtensions->DoAction('defaultadmin', 'm1_', Array, '')
#5 moduleinterface.php(74): CMSModule->DoActionBase('defaultadmin', 'm1_',
Array, '', Object(Smarty_CMS))
#6 {main}