try "ldd /usr/local/lsws/fcgi-bin/lsphp5"
if it does not link to /opt/xml2/lib/libxml2.so.2, the lsphp binary was not built correctly, you need to upgrade to latest 4.1.5 and "build matching PHP" again.
if the problem persist after upgrading to 4.1.5, please contact bug@litespeed with temp root...