first off all, sorry about my english!!

If i try to insallt OXwall i get this
Massage:
"Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /var/www/webXXX/html/XXX/index.php on line 34"

I take a look in the index.php in line 34 is:

"OW::getSession()->start();"

Do you know what can i do?
Is that a problem with thi .htacces
or do i've the wrong rights to the Datafolders?

i hope you can help me,
greetings
Hermann