I need to migrate my joomla 1.7.3 site to joomla 3. So, I first upgraded it to joomla 1.7.4 and 1.7.5 successfully.
In the next step I am going to upgrade it to 2.5.0. So I downloaded the update package for joomla 2.5.0 from: http://www.joomla.org/announcements/release-news/5403-joomla-250-released.html
But unexpectedly installing this package fails by error "Failed loading XML file".
I extracted the zip file and noticed that it does not contain joomla.xml file. Could this be the reason? If not, how can I handle this issue?