自定义模块magento中的管理员用户拒绝访问

I have created a custom module in magento for admin users, i have ready with a basic set up, i have created a user role and give resource access permission for this module, but when i login with that user credentials i am getting an access denied error, but when i login as admin i can access the module. My config.xml fileI have created a custom module in magento for a