Cannot send headers; headers already sent in /home/XXX/public_html/app/Mage.php , line 767

[rathoreajit]

AFTER HACKED I WONT TO TRANSFER MY HOSTING FROM HOSTPAPA TO GODADDY 

1. ZIP ALL DATA FROM FROM HOSTPAPA 

2.change old urls to new address in database 

3.  UPLOAD zip and database.sql to At their location

After That following error displaying.

There has been an error processing your request

Cannot send headers; headers already sent in /home/XXX/public_html/testnew/app/Mage.php, line 767

Trace:
#0 /home/xxx/public_html/testnew/lib/Zend/Controller/Response/Abstract.php(115): Zend_Controller_Response_Abstract->canSendHeaders(true)
#1 /home/xxx/public_html/testnew/app/code/core/Mage/Core/Model/App.php(1246): Zend_Controller_Response_Abstract->setHeader('Content-Type', 'text/html; char...')
#2 /home/xxx/public_html/testnew/app/code/core/Mage/Core/Controller/Varien/Front.php(80): Mage_Core_Model_App->getResponse()
#3 /home/xxx/public_html/testnew/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(202): Mage_Core_Controller_Varien_Front->getResponse()
#4 /home/xxx/public_html/testnew/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#5 /home/xxx/public_html/testnew/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#6 /home/xxx/public_html/testnew/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#7 /home/xxx/public_html/testnew/index.php(87): Mage::run('', 'store')
#8 {main}