check  your user roles in admin and be sure they are all checked for that plugin.  it means you have set user roles in your plugin but have not selected them.

Hello dave,

i tried as you said but i am having ow warning
This is my init.php its same as forum init.php but i am have ow warning

<?php

//OW::getRouter()->addRoute(new OW_Route('registerform.index', 'reg', "REGISTERFORM_CTRL_Reg", 'index'));
$plugin = OW::getPluginManager()->getPlugin('quesans');

OW::getAutoloader()->addClass('QuesansSelectBox', $plugin->getRootDir() . 'classes' . DS . 'quesans_select_box.php');
OW::getAutoloader()->addClass('QuesansStringValidator', $plugin->getRootDir() . 'classes' . DS . 'quesans_string_validator.php');

OW::getRouter()->addRoute(new OW_Route('quesans-default', 'quesans', 'QUESANS_CTRL_Index', 'index'));
OW::getRouter()->addRoute(new OW_Route('customize-default', 'quesans/customize', 'QUESANS_CTRL_Customize', 'index'));
OW::getRouter()->addRoute(new OW_Route('section-default', 'quesans/section/:sectionId', 'QUESANS_CTRL_Section', 'index'));
OW::getRouter()->addRoute(new OW_Route('group-default', 'quesans/:groupId', 'QUESANS_CTRL_Group', 'index'));
OW::getRouter()->addRoute(new OW_Route('topic-default', 'quesans/topic/:topicId', 'QUESANS_CTRL_Topic', 'index'));

OW::getRouter()->addRoute(new OW_Route('add-topic-default', 'quesans/addTopic', 'QUESANS_CTRL_AddTopic', 'index'));
OW::getRouter()->addRoute(new OW_Route('add-topic', 'quesans/addTopic/:groupId', 'QUESANS_CTRL_AddTopic', 'index'));

OW::getRouter()->addRoute(new OW_Route('sticky-topic', 'quesans/stickyTopic/:topicId/:page', 'QUESANS_CTRL_Topic', 'stickyTopic'));
OW::getRouter()->addRoute(new OW_Route('lock-topic', 'quesans/lockTopic/:topicId/:page', 'QUESANS_CTRL_Topic', 'lockTopic'));
OW::getRouter()->addRoute(new OW_Route('delete-topic', 'quesans/deleteTopic/:topicId', 'QUESANS_CTRL_Topic', 'deleteTopic'));
OW::getRouter()->addRoute(new OW_Route('get-post', 'quesans/getPost/:postId', 'QUESANS_CTRL_Topic', 'getPost'));
OW::getRouter()->addRoute(new OW_Route('edit-post', 'quesans/edit-post/:id', 'QUESANS_CTRL_EditPost', 'index'));
OW::getRouter()->addRoute(new OW_Route('edit-topic', 'quesans/edit-topic/:id', 'QUESANS_CTRL_EditTopic', 'index'));
OW::getRouter()->addRoute(new OW_Route('move-topic', 'quesans/moveTopic', 'QUESANS_CTRL_Topic', 'moveTopic'));
OW::getRouter()->addRoute(new OW_Route('subscribe-topic', 'quesans/subscribe-topic/:id', 'QUESANS_CTRL_Topic', 'subscribeTopic'));
OW::getRouter()->addRoute(new OW_Route('unsubscribe-topic', 'quesans/unsubscribe-topic/:id', 'QUESANS_CTRL_Topic', 'unsubscribeTopic'));

OW::getRouter()->addRoute(new OW_Route('add-post', 'quesans/addPost/:topicId/:uid', 'QUESANS_CTRL_Topic', 'addPost'));
OW::getRouter()->addRoute(new OW_Route('delete-post', 'quesans/deletePost/:topicId/:postId', 'QUESANS_CTRL_Topic', 'deletePost'));
OW::getRouter()->addRoute(new OW_Route('quesans_delete_attachment', 'quesans/deleteAttachment/', 'QUESANS_CTRL_Topic', 'ajaxDeleteAttachment'));
OW::getRouter()->addRoute(new OW_Route('quesans_admin_config', 'admin/plugins/quesans', 'QUESANS_CTRL_Admin', 'index'));
OW::getRouter()->addRoute(new OW_Route('quesans_uninstall', 'admin/quesans/uninstall', 'QUESANS_CTRL_Admin', 'uninstall'));
OW::getRouter()->addRoute(new OW_Route('quesans_search', 'quesans/search/', 'QUESANS_CTRL_Search', 'inQUESANSs'));
OW::getRouter()->addRoute(new OW_Route('quesans_search_group', 'quesans/:groupId/search/', 'QUESANS_CTRL_Search', 'inGroup'));
OW::getRouter()->addRoute(new OW_Route('quesans_search_section', 'quesans/section/:sectionId/search/', 'QUESANS_CTRL_Search', 'inSection'));
OW::getRouter()->addRoute(new OW_Route('quesans_search_topic', 'quesans/topic/:topicId/search/', 'QUESANS_CTRL_Search', 'inTopic'));
OW::getRouter()->addRoute(new OW_Route('quesans_approve_topic', 'quesans/approve/:id', 'QUESANS_CTRL_Topic', 'approve'));

QUESANS_CLASS_EventHandler::getInstance()->init();
QUESANS_CLASS_ContentProvider::getInstance()->init();

it means you have already added those routes somewhere else, maybe in your install, im not sure maybe you have them listed twice in your init, but that is what it means. 

Hello dave,
please check the code . i haven't added routes somewhere else.

Actually two  names are added how can i remove this. when i try to uninstall plugin it is not uninstalling perfectly for that i need to commented out the uninstall code inside the admin.php . but after re installation it added another name in oxwall

Topic was moved from Bug reports and troubleshooting.

The normal uninstall as i recall will automatically remove tables and pages from Oxwall, delete will remove it from the plugins table and also delete the plugin files from both the ow_plugins dir and the ow_static dir (if they exist) and also the ow_userfiles dir (if they exist)  You may have to do so manually if you cannot get it to uninstall correctly, then you need to find out why its not uninstalling.