Problem with PHP Session Object

I am facing some problem with my php session. I have deployed a plugin for file management in my moodle application.

The new plugin home page is behaving unexpectedly and is destroying the actual session of my application and is generating new session_id().

Also when I am trying to view session contents using print_r($_SESSION), it is showing "PHP_Incomplete_Class_N开发者_StackOverflow中文版ame" in it.

Actually PHP_Incomplete_Class_Name has nothing to do with session regeneration.

This behaviour appears when you (or your cms/framework/whatever you have) call session_start() before each serialized object's class definition has been parsed.

So you need to include all classes before you started session.