codeigniter 2.02 auto load library session will fail on IIS7

[eluser]Unknown[/eluser]
codeigniter 2.02 auto load library session will fail on IIS7!

Anyone have the same thing?

I just install a new ci 2.02 on my iis7!

it is work when i test run the demo site!

but when i changed the autoload.php ,and modify the autoload library setting!
I just put 'session'!

then cause the 500 internal error!

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anyone can help me?

[eluser]Unknown[/eluser]
my bad~~

I lost some files when i upload the site!

[eluser]Unknown[/eluser]
hello..

I getting a same problem with that, but in my case not in session,
when i set autoload 'database', then error 500 is show up..
the problem occur in web server IIS 7, in web server Apache is working normaly..

is somebody have a idea to solve this problem??