Thank you for the answer but i mean this... (please look at attachments)
http://www.parallels.com/support/policy/plesk-lifecycle/ ("Currently Supported" and "Not Supported" tables...)
....and my last sso.log:
[2013-07-03T08:33:18Z][1104][INFO][:\Program Files\Parallels\Plesk\sso\htdocs\base\main.php(74) main] [begin] Request {id=51d3e1cecfbbb, from='XX.XX.XX.XX:51830', method='POST', url='https://xxxx.org:8443/relay', args=[]}
[2013-07-03T08:33:18Z][1104][DEBUG][:\Program Files\Parallels\Plesk\sso\htdocs\lib\Db.php(26) __construct] Opening DB connection to sqlite:C:\Program Files\Parallels\Plesk\admin\db\sso.db (readable=true, writable=true)
[2013-07-03T08:33:18Z][1104][DEBUG][:\Program Files\Parallels\Plesk\sso\htdocs\lib\Db.php(34) __construct] Opened DB connection to sqlite:C:\Program Files\Parallels\Plesk\admin\db\sso.db
[2013-07-03T08:33:18Z][1104][DEBUG][:\Program Files\Parallels\Plesk\sso\htdocs\lib\Db.php(39) __call] exec: PRAGMA journal_mode = WAL;
[2013-07-03T08:33:18Z][1104][ERROR][:\Program Files\Parallels\Plesk\sso\htdocs\base\main.php(87) main] [end] Request id=51d3e1cecfbbb: exception caught at top level Can not export server's private key as string.; Exception message 'Can not export server's private key as string.', code '0' at C:\Program Files\Parallels\Plesk\sso\htdocs\lib\SslUtils.php (212), php trace: #0 C:\Program Files\Parallels\Plesk\sso\htdocs\lib\Config.php(162): lib_SslUtils::loadKeyPair('C:\Program File...', NULL, 'C:\Program File...') #1 C:\Program Files\Parallels\Plesk\sso\htdocs\lib\Config.php(155): lib_Config->loadKeyPair() #2 C:\Program Files\Parallels\Plesk\sso\htdocs\api_dispatch.php(29): lib_Config->getKeyPair() #3 C:\Program Files\Parallels\Plesk\sso\htdocs\main_dispatch.php(15): make_api_aspect(Object(lib_Config), Object(db_Storage)) #4 C:\Program Files\Parallels\Plesk\sso\htdocs\main_dispatch.php(46): make_main_service(Object(lib_Config), Object(db_Storage)) #5 C:\Program Files\Parallels\Plesk\sso\htdocs\base\main.php(76): init() #6 C:\Program Files\Parallels\Plesk\sso\htdocs\sso_main.php(8): main('init') #7 C:\Program Files\Parallels\Plesk\sso\htdocs\sso_relay.php(4): require_once('C:\Program File...') #8 {main}