I solve my problem by reinstalling owncloud. While reinstalling, i get few problems, that solved by creating new php.ini file in installing folder:
# Magic Quotes is enabled. ownCloud requires that it is disabled to work properly. magic_quotes_gpc = off magic_quotes_runtime = off magic_quotes_sybase = off # PHP PDO module is not installed. extension=pdo.so extension=pdo_sqlite.so extension=sqlite.so extension=pdo_mysql.so