About dhtmlxVault in IIS7

my development environment :Windows 2008, .Net Framework 3.5 and IIS 7

I found ,when I upload big size file ,more than 30M, the error happened.

I set web.config :

<system.webServer>





</system.webServer>

It’s OK~
But the example I download form the site ,don’t has the code.
(sorry ,my english is very poor)Can you Know what I mean?

What is the error message?

Check your script timeout time. HTML uploads are MIME encoded so a 30m file is way larger when encoded. This can easily exceed the script timeout default of IIS.