1. I’ve found pidgin-skype package that seemed not to work properly.
2. Then google for possible bugs: https://bugs.launchpad.net/ubuntu/+source/pidgin-skype/+bug/567248
3. Here comes the solution: http://eion.robbmob.com/
OK. To start Pidgin minimized follow this thread.
At last, i got pidgin screenlet working, follow deviantart…
I removed empathy cause of no need.