Magento

I’m working on xampp with windows and Magento 1.1.6.

I wanted to change access to a shop in order to have two special url for two shops, without using the list of the bottom of the page.

So I went in Admin/System/Config/, I changed the website. In General / Website, I changed the unsecure and secure url base. Now nothing is working (admin or website), I always got this message :

****
Warning: simplexml_load_string() [function.simplexml-load-string]: Entity: line 299: parser error : Comment not terminated
<!--

<admin>
<fieldsets>
<cat in D:1-xampp\htdocs\magento\lib\Varien\Simplexml\Config.php on line 500
Trace:
#0 D:1-xampp\htdocs\magento\lib\Varien\Simplexml\Config.php(500): mageCoreErrorHandler(2, ‘simplexml_load_...’, ‘D:1-xampp\htd...’, 500, Array)
#1 D:1-xampp\htdocs\magento\lib\Varien\Simplexml\Config.php(488): Varien_Simplexml_Config->loadString(’loadFile(’init(’D:1-xampp\htd...’)
#4 D:1-xampp\htdocs\magento\app\Mage.php(424): Mage_Core_Model_App->init(Array)
#5 D:1-xampp\htdocs\magento\app\Mage.php(443): Mage::app(’’, ‘store’, Array)
#6 D:1-xampp\htdocs\magento\index.php(52): Mage::run(’’, ‘store’, Array)
#7 {main}
****

I don’t have any idea, does someone have ?

Thank you !