updatedb
locate libxerces-c.so
- if version behind .so > 27, or you're very brave whith a lower number:
ln -s libxerces-c.so. libxerces-c.so.27
- run server again
(The problem is caused by the MTA:SA server only using version 27, as its linked against it. If you have a slightly different version it might work as well. Or install the correct version.
WARNING: all on your won risk ofcourse!