Magento – 1.9 magento change admin panel from backend

I changed my website admin panel url address from backend than my admin panel is lost.

Than change back all phpmyadmin settings:

admin/url/custom
web/unsecure/base_url
web/secure/base_url

This is my phpmyadmin screenshots, just I don't know why I have 2 web/unsecure/base_url and web/secure/base_url

and this is my app/etc/index.xml file

and I delete all my var/cache and var/session files from ftp.

I think look like I change back my all configuration, now when I try login my admin panel url 'admin', I have this error: There has been an error processing your request
Exception printing is disabled by default for security reasons.

Error log record number: 570805581814

and this is 570805581814 report file:

a:5:{i:0;s:67:"Illegal scheme supplied, only alphanumeric characters are permitted";i:1;s:2908:"#0 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/Store.php(777): Zend_Uri::factory('admin/')
#1 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/Store.php(611): Mage_Core_Model_Store->isCurrentlySecure()
#2 /home/bilginirmak/public_html/app/Mage.php(382): Mage_Core_Model_Store->getBaseUrl('skin', NULL)
#3 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/Design/Package.php(349): Mage::getBaseUrl('skin', NULL)
#4 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/Design/Package.php(503): Mage_Core_Model_Design_Package->getSkinBaseUrl(Array)
#5 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Abstract.php(1035): Mage_Core_Model_Design_Package->getSkinUrl('reset.css', Array)
#6 /home/bilginirmak/public_html/app/design/adminhtml/default/default/template/login.phtml(32): Mage_Core_Block_Abstract->getSkinUrl('reset.css')
#7 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/bilginirm...')
#8 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('adminhtml/defau...')
#9 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#10 /home/bilginirmak/public_html/app/code/core/Mage/Adminhtml/Block/Template.php(81): Mage_Core_Block_Template->_toHtml()
#11 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Adminhtml_Block_Template->_toHtml()
#12 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#13 /home/bilginirmak/public_html/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Core_Block_Text_List->_toHtml()
#14 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#15 /home/bilginirmak/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#16 /home/bilginirmak/public_html/app/code/core/Mage/Adminhtml/controllers/IndexController.php(82): Mage_Core_Controller_Varien_Action->renderLayout()
#17 /home/bilginirmak/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_IndexController->loginAction()
#18 /home/bilginirmak/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('login')
#19 /home/bilginirmak/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#20 /home/bilginirmak/public_html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#21 /home/bilginirmak/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#22 /home/bilginirmak/public_html/index.php(87): Mage::run('', 'store')
#23 {main}";s:3:"url";s:6:"/admin";s:11:"script_name";s:10:"/index.php";s:4:"skin";s:5:"admin";}

So guys what I have to do for get back my admin panel?