Redmine

Hello!

After restore backup of my system redmine can't write changes. For example:
If i change wiki page and click button "save", redmine can not save this changes.
Permissions for root folder of Redmine:

drwxr-xr-x 16 root root 4096 2010-03-16 18:15 .
drwxr-xr-x 3 root root 4096 2010-03-16 18:15 ..
drwxr-xr-x 8 root root 4096 2010-03-16 18:15 app
drwxr-xr-x 6 root root 4096 2012-04-10 18:23 config
drwxr-xr-x 4 root root 4096 2010-03-16 18:34 db
drwxr-xr-x 3 root root 4096 2010-03-16 18:15 doc
drwxr-xr-x 6 root root 4096 2010-03-16 18:15 extra
drwxrwxrwx 3 www-data www-data 73728 2012-11-01 10:51 files
rw-r--r- 1 root root 316 2010-03-16 18:15 .gitignore
drwxr-xr-x 8 root root 4096 2010-03-16 18:15 lib
drwxr-xr-x 3 www-data www-data 4096 2012-11-06 17:24 log
drwxr-xr-x 9 root root 4096 2010-03-16 18:15 public
rw-r--r- 1 root root 307 2010-03-16 18:15 Rakefile
rw-r--r- 1 root root 160 2010-03-16 18:15 README.rdoc
drwxr-xr-x 5 root root 4096 2010-07-07 16:00 script
drwxr-xr-x 6 root root 4096 2010-03-16 18:15 .svn
drwxr-xr-x 9 root root 4096 2010-03-16 18:15 test
drwxr-xr-x 8 www-data www-data 4096 2010-03-16 18:15 tmp
drwxr-xr-x 6 root root 4096 2010-03-16 19:58 vendor

Permissions for root folde of mysql

drwxr-xr-x 8 mysql postdrop 4096 2012-11-06 18:34 .
drwxr-xr-x 65 root root 4096 2011-04-29 16:05 ..
drwx------ 2 mysql postdrop 4096 2010-03-15 13:39 bugs
rw-r--r- 1 mysql postdrop 0 2011-04-29 16:05 debian-5.1.flag
rw-rw--- 1 mysql postdrop 77594624 2012-11-06 19:00 ibdata1
rw-rw--- 1 mysql postdrop 5242880 2012-11-06 19:00 ib_logfile0
rw-rw--- 1 mysql postdrop 5242880 2012-11-06 19:00 ib_logfile1
drwxr-xr-x 2 mysql postdrop 4096 2011-04-29 16:05 mysql
rw------ 1 mysql postdrop 6 2010-03-15 13:37 mysql_upgrade_info
drwx------ 2 mysql postdrop 4096 2010-09-16 18:11 redmine

Thanks in advance.