IIS7 Microsoft VBScript runtime error '800a01ad'

Fox met this problem this morning. After some investigations, Fox found that it is caused by the 64bis and 32bits.

This problem will happen only if you install a 32bits component in a 64 bits machine. To solve it can be done by changing the "Application Pool" setting of your webapp or website to support 32 bits(right click on your application pool and choose advanced settings).