If you happen to be using the Persits mail component and you get the 'Access is denied' exception:

Persits.MailSender.4 error '800a0011'

Access is denied.

/pages/somepage.asp, line 208

You'll probably find, from the Persits support site or elsewhere, that the queue folder needs to have increased permissions. It doesn't however tell you where this is. So here is the default install path for version 4:

C:\Program Files\Persits Software\AspEmail\Queue

As far as the permissions go I have found that granting Read and Write permissions to the accessing account on that folder is sufficient. In IIS 6 the accessing account for .NET will be the identity of the App Pool assigned to the site (if you are not doing impersonation) which is the NetworkService account by default. For Classic ASP it will be the anon account (Which by default is the IUSR_xxx) for anon access or the user/group if you are doing other types of auth.

Evidently the aspnet_compiler.exe does not care about .refresh files (From my tests and what I read on the internets). It would be nice if it did as it would reduce the steps needed to build a WSP (Web Site Project) on a build server. I ended up just manually copying the assemblies into the bin folder before the build as follows in this nant script:

<mkiisdir dirpath="..\BabelFish.ServiceHost.Web" vdirname="BabelFish.ServiceHost.Web" />

<copy todir="..\BabelFish.ServiceHost.Web\bin">
    <fileset basedir="..\BabelFish.Services\bin">
        <include name="*.dll" />
    </fileset>
</copy>

<exec program="C:\WINDOWS\Microsoft.NET\Framework\${framework.version}\aspnet_compiler.exe" useruntimeengine="true">
    <arg value="-p" />
    <arg value="..\BabelFish.ServiceHost.Web" />
    <arg value="-v" />
    <arg value="BabelFish.ServiceHost.Web" />
</exec>

<deliisdir vdirname="BabelFish.ServiceHost.Web" />

In order to configure WCF 3.0 to run under ASP.NET you need to run the installer (ServiceModelReg.exe) in the WFC 3.0 Framework folder (<system drive>\<windows folder>\Microsoft.NET\Framework\v3.0\Windows Communication Foundation) with the /i parameter.