Many issues related to php52s (in Kloxo-MR 6.5.0.f) and php53s (in Kloxo-MR 6.5.1.b).
To fix this issue:
1. For Kloxo-MR 6.5.0.f
cd /
rm -f *.rpm
yum replace mysql --replace-with=mysql55
chkconfig mysqld on
yum clean all
yum update php52s
sh /script/restart
2. For Kloxo-MR 6.5.1.b
cd /
rm -f *.rpm
yum clean all
yum replace mratwork-release --replace-with=mratwork-testing
yum update kloxomr
sh /script/php53s-installer
sh /script/fixlxphpexe php53s
sh /script/restart
sh /script/cleanup
and then go to 'switch program' to re-update web and go to 'webserver configure' to re-update php-type.