Yes I already installed the apache 2.2, i installed the lamp
I would suggest you to start from scratch, LAMP comes with a pre-configured Apache 2.2 which might be tampering with your current settings, get rid of LAMP and do
sudo apt-get install apache2.
Who knows, the error might suddenly be gone!
The error itself mentions a specific configuration file, have you followed the instructions in that file?
You can edit the file with
sudo gedit /etc/apache2/mods-available/dav_svn.conf
If there is nothing to see there or if it's an example, try renaming the file temporarily...
But I bet it has to do with the LAMP installation.