Just after installation, i got this error when attempting to load the SMF link.

Fatal error: main() [<a href='function.main'>function.main</a>]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition &quot;jsmfFrontend&quot; of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in /home/danny/public_html/components/com_smf/smf.php on line 106

Any ideas on how i can fix this?

Joomla version: 1.5 (Legacy: 1.0)
Joomla-SMF Forum 2.0.2

Thanks
Dan.