www crashed and no-www is ok

I have a site: [url=http://www.example.com/]Example Domain Suddenly I have Sumbols characters in the www alias. When I change the site to no-www symbols are gone. When I mean sumbols I mean a White Screen Of Death and the following sumbols: ?]??n?0 ???)\?!?CS????UZ?i?.D??%?({?%???d%???X?????:?2??m??+??h?q>MS2='????e??$!?????Fjb?y???U?7??}????!W??m???)???q 0V.?^?G??'?~?;F?f?fl?3??f??f???9? 3???+B??C?? ? To sum-up, [url=http://www.example.com]Example Domain has problem, and example.com hasn't problem. Thoughts? I am running apache 2.2.x In my dev tools is see this : ?]??n?0 ???)\?!?CS????UZ?i?.D??%?({?%???d%???X?????:?2??m??+??h?q>MS2='?<????e??$!?????Fjb?y???U?7??}????!W??m???)???q 0V.?^?G??'?~?;F?f?fl?3??f??f???9? 3???+B??C?? ?