Server Error in '/thumb' Application.

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Line 191:					Response.ContentType = ContentType
Line 192:					response.writefile(FilePath)
Line 193:					response.flush
Line 194:					File.Delete(FilePath)
Line 195:				else

[FileNotFoundException: Could not find file 'w:\Temp.web\thumb\01871607.png'.]
   System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) +519
   System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) +776
   System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) +65
   System.Web.Hosting.IIS7WorkerRequest.SendResponseFromFile(String name, Int64 offset, Int64 length) +98
   System.Web.HttpFileResponseElement.System.Web.IHttpResponseElement.Send(HttpWorkerRequest wr) +89
   System.Web.HttpWriter.Send(HttpWorkerRequest wr) +84
   System.Web.HttpResponse.UpdateNativeResponse(Boolean sendHeaders) +453
   System.Web.HttpResponse.Flush(Boolean finalFlush, Boolean async) +152
   System.Web.HttpResponse.Flush() +23
   _Default.Page_Load(Object sender, EventArgs e) in E:\InetPub\wwwroot\Utils\thumb\Default3.aspx.vb:193
   System.Web.UI.Control.OnLoad(EventArgs e) +95
   System.Web.UI.Control.LoadRecursive() +59
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678