Hello guys, sorry for my english

I tried to install koreader but it failed.
1) I installed Kobo files monitor (copied koboroot.gz into .kobo directory)
2) I started device and updated.
3) And then i copied "koreader folder" and koboroot.gz into .kobo directory
4) i started device and updated.
5) But there is no KoReader icon, i can't see any change
6) So, i downloaded latest nightly "koreader-v2013.03-398-gd99c71a.zip" from
here i copied again and i started the device but my kobo glo bricked.
I made a hard reset and its ok now. But why can't i install koREADER?