Jeff Sanders Technical Blog

I am a Microsoft employee that has worked on all aspects of the Web Stack for a long time. I hope these blogs are useful to you! Use this information at your own risk.

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Msxml3 Dll Access Is Denied Msxml4 Dll Access Is Denied

- 15 Jan 2008

The following vb Script can fail with an “Access is denied” error message:

Dim aRequest
Set aRequest = CreateObject (“Microsoft.XMLHTTP”)
aRequest.Open “POST”,”http://www.contoso.com/PostAccepter.aspx”,False
aRequest.setRequestHeader “Content-Type”, “application/x-www-form-urlencoded”
aRequest.Send “this is data”
Wscript.Echo aRequest.responseText

If you use Fiddler (http://fiddler2.com) you will see a comple of redirects to Microsoft.com.  That is the reason for this failure in my case.  By clearing the flag in Internet Explorer for that internet zone that prevents this POST (Access data sources across domains), I am able to run again.

1.	In Internet Explorer, click Internet Options on the Tools menu.
2.	On the Security tab, click Trusted sites, and then click Sites.
3.	Add your site to the zone.
4.	Click Custom Level.
5.	Under Miscellaneous/Access data sources across domains, click Enable.

 

see <http://msdn.microsoft.com/en-us/library/cc507438(VS.85).aspx> (security model)

also see <http://support.microsoft.com/?id=820882>

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