Roundcube needs php 5.2.0 or greater
 

Checking PHP version
Version: NOT OK(PHP Version 5.2.0 or greater is required 5.1.6 detected)

how can i upgrade to 5.2.0 or greater version ?

and then roundcube asks for this

FileInfo: NOT AVAILABLE

What is the name of distribution that you are using?

If you installed all available package updates of your linux distribution already then I recommed that you just ignore this, roundcube should work fine with your php version. Also fileinfo is a optional package.

okey thank you very much i will try this but then i should just do manual install not the installer way because the next button dose not work :)