When I am upload larger than 30mb file to Vibe, it show HTTP 404 and the page cannot be displayed.

I am check the vibe documents know that that need configuring IIS to allow uploading of large files to the vibe site

However, I don't understand the instruction on this article
For information about how to configure IIS to allow you to upload large files, see article 925083 in the
Microsoft Support Knowledgebase (http://support.microsoft.com/kb/925083).

Firstly I can't locate the Web.config file. By default folder is Inetpub\wwwroot\wss\VirtualDirectories\VirtualDire ctoryFolder

If I follow vibe installation guide to setup, virutalDirectoryFolder should be under C:\Program Files\Novell\Vibe IIS Plugin. But I can't find any Web.config file. Cloud you help.