On some servers the installation of templates or extensions doesn't work in Joomla 2.5, although you have set all directory- and file permissions in the right way. You realize that, if Joomla reports following message during the installation.
Warning: Failed to move file!
Reason for that, can be wrong directory- and file permissions or the classical www-run problem, if your hoster runs Apache as module. In this tutorial we show you, how you can solve this problem by the run of PHP as fastCGI, its advantages and disadvantages.