CMS Made Simple Forums

hallo, its my first time with this cms...and    I have problem
All instalation was okey, with no problem at all. (new version of cms)
Admin panel works fine, too.
I can upload files, photos ...
I can add news..
but page isn't working --> http://easy2568.easyisp.pl/

I get this error message:
Fatal error: Call to a member function on a non-object in /home2/easy2568/domains/easy2568.easyisp.pl/public_html/plugins/function.breadcrumbs.php on line 56

I don't change anything in source installation files!
What now?
Pliz help me...

Try this:

Change  function.breadcrumbs.php  found in the folder plugins

from

while (isset($currentNode) && $currentNode->getLevel() > 0)

to this

while ($currentNode null && $currentNode->getLevel() > 0)

Unfortunatelly doesn't make any change:(