it si not showing security roles structure when i am going to create permissions to a usergroup

hello sir,

when i am going to create permissions to an usergroup, not displaying the security roles tree and it is showing 'error executing code,how to resolve this…

 
Error is-->Error executing code: SysSecurityView (object) has no valid runable code in method 'getList'.

Stack trace:
(C) \Classes\SysSecurityView\getList
(C) \Classes\SysSecurity\initViewControl - line 17
(C) \Forms\SysUserGroupSecurity\Methods\updateDisplay - line 33
(C) \Forms\SysUserGroupSecurity\Methods\tabChanged - line 3
(C) \Classes\FormTabControl\TabChanged - line 3

than Q