MemoryStream download fails from IIS6 to IIS7 - iis-7

Question

We are converting from IIS6 to IIS7 and all has went very well except our download section. What happens is the download is initiated, but it appears a redirect is taking place and our default.aspx page is downloaded instead of the requested file by the user. Below is the code we used with IIS6.
Private Sub GetFile(ByVal ReportQueueId As System.Int32, _
ByVal FileName As System.String _
)
Dim stream As System.IO.MemoryStream = Nothing
Dim lngRecordCount As System.Int32 = 0
Dim objWebClient As New System.Net.WebClient
Dim strServerName As System.String
Try
strServerName = Page.Request.Item("SERVER_NAME").ToString()
Dim fURI As New System.Uri("http://" & strServerName & "/reportmonitor/" & FileName)
' Open the file into a stream.
stream = New System.IO.MemoryStream(objWebClient.DownloadData(fURI), False)
' Total bytes to read:
Dim bytesToRead As Long = stream.Length
Page.Response.Clear()
Page.Response.ContentType = "application/octet-stream"
Page.Response.AddHeader("Content-Disposition", "attachment; filename=" & FileName.ToString())
Page.Response.AddHeader("Content-Length", bytesToRead.ToString())
' Read the bytes from the stream in small portions.
While bytesToRead > 0
' Make sure the client is still connected.
If Response.IsClientConnected Then
' Read the data into the buffer and write into the output stream.
Dim buffer As Byte() = New Byte(9999) {}
Dim length As Integer = stream.Read(buffer, 0, 10000)
Response.OutputStream.Write(buffer, 0, length)
Response.Flush()
' We have already read some bytes.. need to read
' only the remaining.
bytesToRead = bytesToRead - length
Else
' Get out of the loop, if user is not connected anymore..
bytesToRead = -1
End If
End While
'Update status
lngRecordCount = UpdateStatus(ReportQueueId, _
listcounts_common.ListCountsCommon_CL.ReportQueueStatus.rqsDownloaded _
)
Catch SystemException As System.Exception
'Update status
lngRecordCount = UpdateStatus(ReportQueueId, _
listcounts_common.ListCountsCommon_CL.ReportQueueStatus.rqsOnHold _
)
'most likely a 404 file not found error
Me.lblErrorMessage.Text = CLASS_NAME & ":GetFile: " & SystemException.Message.ToString
Me.lblErrorMessage.Visible = True
Finally
objWebClient = Nothing
stream = Nothing
End Try
End Sub
After this code is run the only other thing I have read it might be is in the parent function that calls GetFile() we have code for the following:
' stops page html output. If this is not done, un-desired html code will be added to csv files
Page.Response.End()
Any thoughts on the difference between IIS6 and 7 and this process? Everything I have tried has not worked. The new site is running in Itegrated Mode, .NET 4.
Thank you...
UPDATE
I modified the fURI to be an external file:
fURI = New System.Uri("http://manuals.info.apple.com/en_US/ipad_user_guide.pdf")
This file downloads perfectly, so I am assuming it is a permissions issue in IIS7...any ideas on what I may have missed?

Answer 1

Since the site is using Forms Authentication, adding an allowable location path in the web.config for the virtual resolved the issues in converting to IIS7.
<location path="reportmonitor">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>