Subversion 1.8 Error after upgrade

Hi,  I have upgraded subversion from 1.7 to 1.8 using WANdisco apt mirror. All the required packages are installed. but im getting the following error when starting apache.    apache2: Syntax error on line 210 of /etc/apache2/apache2.conf: Syntax error on line 2 of /etc/apache2/mods-enabled/dav_svn.load: Cannot load /usr/lib/apache2/modules/mod_dav_svn.so into server: /usr/lib/apache2/modules/mod_dav_svn.so: undefined symbol: svn_repos__fs_type  Action 'configtest' failed.  The Apache error log may have more information.   ...fail!      Ubuntu 12.04.2 LTS X86_64  apache 2.2.22  Packages Installed  ii python-subversion 1.8.0-1+WANdisco Python bindings for Subversion  ii subversion 1.8.0-1+WANdisco Advanced version control system  ii subversion-tools 1.8.0-1+WANdisco Assorted tools related to Subversion  ii libapache2-svn 1.8.0-1+WANdisco Subversion server modules for Apache  ii libjpeg-turbo8 1.1.90+svn733-0ubuntu4.1 IJG JPEG compliant runtime library.  ii libsvn-perl 1.8.0-1+WANdisco Perl bindings for Subversion  ii libsvn1 1.8.0-1+WANdisco Shared libraries used by Subversion  ii login 1:4.1.4.2+svn3283-3ubuntu5.1 system login tools  ii passwd 1:4.1.4.2+svn3283-3ubuntu5.1 change and administer password and group data    Stuck up with this issue. Kindly respond .    Thanks,  Sivaprakash R