Strange error in scaffolding

[eluser]Rabbi[/eluser]
When i try with this link:
http://localhost/ci/index.php?blog/scaffolding/
(ci=CodeIgniter) OS=windows XP, Server= IIS

Code:

Scaffolding:  entries                            View Records   |   Create New Record


No data exists for this table yet.
Create New Record

                 CodeIgniter, by EllisLab - Version 1.6.2

                       Page rendered in 0.1805

Fatal error: Call to a member function close() on a non-object in C:\Inetpub\wwwroot\ci\system\codeigniter\CodeIgniter.php on line 272

Can anyone tell me, how to get rid of from this error? Why is this error showing?