by osiguan pelkett.
I solved my problem by myself
It's a bug in the XAMPP 1.7.7 which provides wrong MySQL version.
(According to this thread in ApacheFriends forum: www dot apachefriends dot org/f/viewtopic.php?f=16&t=50307 )
I just installed latest XAMPP 1.8.1, and now Moddle installation has no problem.
Your server environment meets all minimum requirements.
Thank you.